ライフサイエンスコーパス: calix

1 (calix)(CH(3)OH), and 3, cis-Mo(2)(DAniF)(2)(calix).

2 ]phyrin derivatives namely calix[8]- (4) and calix[16]phyrin (5), involving two and four BF(2) units,

3 process between 8(+) and 3, we revealed two calix[2]pseudorotaxane isomers in which the calix-wheel

4 ) and 8(+), the two possible orientations of calix[2]pseudorotaxane, namely, endo-benzyl and endo-alk

5 ly, the synthesis of ammonium-based oriented calix[2]rotaxane is here described.

6 The synthesis of calix[2]thia[4]phyrin 3, a core-modified expanded calixp

7 yclic peri substituents lead to a 3,5-linked calix[3]naphthalene, whereas cyclic peri substituents gi

8 e-step procedure has been applied to various calix[4, 5, 6, and 8]arenes, and in all cases, calixaren

9 -25,26,27,28-tetrakis(ethoxycarbonylmet hoxy)calix[4]arene (38), 5,11,17,23,29,35-hexakis(chlorosulfo

10 27,28-tetrakis(chlorosulfonyl phenoxyacetoxy)calix[4]arene (44), 5,11,17,23,29,35-hexakis(tert-butyl)

11 -ray structures of the alkali metal salts of calix[4]arene (HC4) illustrate the great influence of th

12 r rim 1,3-di{4-antipyrine}amide conjugate of calix[4]arene (L) exhibits high selectivity toward Hg(2+

13 A phenylene diimine capped conjugate of 1,3-calix[4]arene (L) was synthesized and characterized, and

14 ne-diimine-capped conjugate of lower rim 1,3-calix[4]arene (L) was synthesized, characterized, and sh

15 nalogue of biological receptors, cone-shaped calix[4]arene 1d is able to recognize a n-BuNH3(+) guest

16 Reaction of the dioxotetramethoxy calix[4]arene 9b with MeLi followed by 2-fold eliminatio

17 diprotonated (monoprotonated) trifunctional calix[4]arene acts as a more or less innocent spectator.

18 A hybrid nanocarbon receptor consisting of a calix[4]arene and a bent oligophenylene loop ("molecular

19 xed via the axial route, passing through the calix[4]arene annulus, and provide evidence for complexa

20 Furthermore, details related to "soluble" calix[4]arene are described.

21 h magnetic nano-inclusions using p-tertbutyl calix[4]arene as ionophore and polymeric matrix (polyvin

22 reviously reported soluble molecular Al(III)-calix[4]arene catalysts.

23 ewis acid active site, consisting of Al(III)-calix[4]arene complexes on the surface of silica.

24 Calix[4]arene compound 0118 is an angiostatic agent that

25 Starting from the four well-known calix[4]arene conformations, six conformers for this deh

26 The triazole linked o-imino phenol appended calix[4]arene conjugate (L) has been synthesized and cha

27 The mode of binding of Fe(3+) by calix[4]arene conjugate has been shown by absorption, (1

28 tion of a triazole linked quinoline appended calix[4]arene conjugate, L, and its fluorescence turn on

29 hylamine ethylimino-appended triazole-linked calix[4]arene conjugate, L, has been synthesized and cha

30 upper rim bis-monopyrrolotetrathiafulvalene-calix[4]arene conjugates 2a,b and 3a,b have been efficie

31 The hexagonal close-packed arrangement of calix[4]arene contains lattice voids that can occlude sm

32 through trimethylenethioureido spacers to a calix[4]arene core and differing for the presence of met

33 ring a calix[4]pyrrole for anion binding and calix[4]arene crown-5 for cation recognition, was found

34 st to complexation of the K(+) cation by the calix[4]arene crown-5 moiety.

35 f these, the Cs(+) cation interacts with the calix[4]arene crown-5 ring weakly.

36 The cone-calix[4]arene derivative (1H3)(2+), decorated at the upp

37 A cone-calix[4]arene derivative, featuring a guanidinium group

38 .5 x 10(4)-fold at 1 mM concentration of the calix[4]arene derivative.

39 Spherical anions induce the dimerization of calix[4]arene derivatives 3 and 4 bearing squaramide moi

40 l compound, the catalytic superiority of the calix[4]arene derivatives points to a high level of coop

41 Calix[4]arene derivatives, blocked in the cone conformat

42 bly amended reactivity, compared with common calix[4]arene derivatives, which is governed by the rele

43 etraradical, as well as in the 1,3-alternate calix[4]arene diradical.

44 hich each dendritic branch terminates with a calix[4]arene entity.

45 The first highly water-soluble perylene-calix[4]arene hybrid with the calixarene scaffold acting

46 Fluorinated tungsten calix[4]arene imido complexes were synthesized and used

47 pair-site catalyst incorporating P-bridging calix[4]arene ligands dispersed on siliceous supports, c

48 Here, using calix[4]arene macrocycles bearing phosphines as crude mi

49 energetic and structural preferences of the calix[4]arene model change dramatically when it is bound

50 This structure features both a calix[4]arene moiety which serves as a molecular recogni

51 magnetic studies of the previously reported calix[4]arene nitroxide tetraradical, which possesses co

52 hilic cholate groups to a covalent scaffold (calix[4]arene or 1,3,5-2,4,6-hexasubstituted benzene).

53 These values are as follows: calix[4]arene pKa(1) = 19.06 +/- 0.22, pKa(2) > 33; cali

54 The roles of the calix[4]arene platform as well as the preorganized bindi

55 The other relies on the electrografting of a calix[4]arene platform bearing diazonium functionalities

56 Magnetic studies of the calix[4]arene polyradical scaffolds in frozen solutions

57 An ion-pair receptor, the calix[4]pyrrole-calix[4]arene pseudodimer 2, bearing a strong anion-reco

58 to structural conformation of 1,3-alternate-calix[4]arene scaffold and molecular electrostatic poten

59 arrays of strong halogen-bond donors above a calix[4]arene scaffold gave even weaker activities.

60 linking four cholate units to a cone-shaped calix[4]arene scaffold through azobenzene spacers.

61 The calix[4]arene skeleton is electrochemically inactive, bu

62 guanidinium unit connected by a 1,2-vicinal calix[4]arene spacer was investigated in the transesteri

63 ss of cryptand-like ionophore based on a bis calix[4]arene structure has been developed.

64 cation was bound to the crown ether-strapped calix[4]arene subunit.

65 ded mainly a mixture of trioxo- and tetraoxo-calix[4]arene tetraacetate derivatives.

66 The ion transport activity of calix[4]arene tetrabutylamide 1,3-alt 2 was studied in l

67 nd X-ray crystallography data, indicate that calix[4]arene tetrabutylamide 2 (1) forms ion channels i

68 Calix[4]arene tetrabutylamide 2 is a rare example of an

69 ng the sodium-selective ionophore tert-butyl calix[4]arene tetramethyl ester and a lipophilic inert s

70 ng the sodium-selective ionophore tert-butyl calix[4]arene tetramethyl ester and the lithium ionophor

71 An analogue, calix[4]arene tetramethylamide 1, self-assembles in the

72 -bond exchange coupling in the 1,3-alternate calix[4]arene tetraradical is antiferromagnetic, while t

73 cal is antiferromagnetic, while that in cone calix[4]arene tetraradical is ferromagnetic.

74 ferromagnetic in both cone and 1,3-alternate calix[4]arene tetraradical, as well as in the 1,3-altern

75 f Ugi-4CR for the narrow-rim modification of calix[4]arene toward the synthesis of a series of tripep

76 Synthesis of 1,3-alternate bis-calix[4]arene tube 3 of 5 x 11 A internal dimensions is

77 the specific bonding and size-selectivity of calix[4]arene tungsten-imido complex combined with (19)F

78 Alteration of the calix[4]arene upper rim environment enables fine-tuning

79 The calix[4]arene used to make the carciplex structure is 25

80 be documented by the reaction of the bridged calix[4]arene with P(2)O(5) or Nafion-H, leading (apart

81 riazole linked imino-thiophenyl conjugate of calix[4]arene, [ZnL], was demonstrated to be highly fluo

82 n provided by the hydroxyl hydrogen bonds in calix[4]arene, neither the cone nor the 1,2-alternate co

83 of a stable macrocyclic tetranitroxide 1, a calix[4]arene, which is functionalized with four tert-bu

84 is is not the case with the tetrasubstituted calix[4]arene, whose mono-, di-, and triprotonated forms

85 ynthetic models for the filter, p-tert-butyl-calix[4]arene-(OCH(2)CO-XOBz)(4) (X = V, VG, VGY), 1-3.

86 A new triazole-linked anthracenyl-appended calix[4]arene-1,3-diconjugate (L) has been synthesized a

87 loying 25,26,27,28-tetrapropoxy-5,17-dibromo-calix[4]arene-11,23-dicarboxylic acid, two 1:1 dimetal:c

88 A new derivative of dipodal 1,3-calix[4]arene-based chemosensor (R), which was containin

89 In this study, calix[4]arene-based glycoclusters functionalized with ga

90 ith linear and branched connectivity between calix[4]arene-based macrocycles, are prepared via modula

91 (dendritic) modules and the tetrafunctional calix[4]arene-based macrocyclic core.

92 epoxidation rate constants (per Ti) than on calix[4]arene-based materials.

93 A competition experiment between calix[4]arene-bis(benzocrown-6) and NH4 subset Rh4Ru3 re

94 aphic resin has been developed by dissolving calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6)

95 in the aqueous phase was demonstrated using calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6)

96 rties of a water-stabilized dimer comprising calix[4]arene-guanosine conjugate cG 2.

97 Active sites consist of grafted single-site calix[4]arene-Ti(IV) centers or their calcined counterpa

98 2-alternate, and 1,3-alternate by analogy to calix[4]arene.

99 ion is situated in the bowl-shaped cavity of calix[4]arene.

100 the cyclic network of four hydrogen bonds in calix[4]arene.

101 moxifen, and p-tetra-sulfonato-tetra-methoxy-calix[4]arene.

102 e one of the different geometries allowed in calix[4]arene.

103 3))(2)(DMF)(6)(H(2)O)(6)](OH)(2) (where C4 = calix[4]arene; Ln = Gd (1), Tb (2), Dy (3)).

104 A fluorogenic derivative of 1,3-alternate calix[4]arenebis(crown-6) (1) containing a dansyl group

105 Exposure of tetra-O-alkylated calix[4]arenes 1 and 2, possessing either a cone or a 1,

106 n of the zeroth generation example with four calix[4]arenes and of the first generation example with

107 The chemical ingredients of the assembly, calix[4]arenes and oligothiophenes, are screened separat

108 Calix[4]arenes constrained to the 1,3-alternate conforma

109 Kinetic observations during the formation of calix[4]arenes from calix[8]arenes are included.

110 The use of methylene-bridged calix[4]arenes in 3d/4f chemistry produces a family of c

111 spectra of alkali metal salts of monoanionic calix[4]arenes indicate that they have the cone conforma

112 s of a series of tripeptoid and tetrapeptoid calix[4]arenes is described.

113 method for the synthesis of optically active calix[4]arenes that are chiral as a result of substituti

114 influence on the conformation and binding of calix[4]arenes to alkali-metal cations has been studied

115 Attachment of functionalized calix[4]arenes to silica gel was demonstrated, which aff

116 can be assembled by linking two bowl-shaped calix[4]arenes via four dimetal units, (DAniF)(2)Rh(2) (

117 properties of the newly synthesized peptoid calix[4]arenes were also investigated.

118 The structure and reactivity of grafted Ti-calix[4]arenes were weakly dependent on thermal treatmen

119 intrinsic conformational properties of cone calix[4]arenes with orientable groups at the upper rim w

120 nificance of cation-pi binding, not only for calix[4]arenes, but also for other supramolecular and bi

121 -bromodienone route, previously reported for calix[4]arenes, is also effective for the functionalizat

122 -derived nitrone on diversely functionalized calix[4]arenes.

123 allows for subsequent "in situ" formation of calix[4]arenes.

124 and of the first generation example with 12 calix[4]arenes.

125 )/N(2)O(4) is proposed, which employs simple calix[4]arenes.

126 Hydride abstraction of a calix[4]azulene with Ph(3)CPF(6) afforded a tetraazulene

127 ence of florisil to give excellent yields of calix[4]azulene.

128 Substituted calix[4]azulenes were prepared by reacting 6-alkylazulen

129 The 3,6-linked calix[4]naphthalene is prepared in pure form by a dimeri

130 The binding of mercury with the calix[4]phyrins mentioned above had been observed in the

131 Compared with the parent calix[4]pyrrole (1), they were found to exhibit remarkab

132 hexafluorophosphate) to a tetrathiafulvalene calix[4]pyrrole (TTF-C4P) donor enforces a host conforma

133 llerenes (C60 and C70) by tetrathiafulvalene-calix[4]pyrrole (TTF-C4P) receptors and the nature of th

134 This hexapyrrolic calix[4]pyrrole 1 is formed as cis- and trans-configurat

135 ly improved efficiency (>10-fold relative to calix[4]pyrrole 1).

136 Herein we describe a large capsule-like bis-calix[4]pyrrole 1, which is able to host concurrently tw

137 or for anions, meso-substituted hexapyrrolic calix[4]pyrrole 1.

138 , namely a tetrathiafulvalene-functionalized calix[4]pyrrole and a bis(dinitrophenyl)-meso-substitute

139 Complexation between a water-soluble calix[4]pyrrole and a ditopic pyridine N-oxide derivativ

140 mation and the interplay of a self-assembled calix[4]pyrrole array that exhibits three limiting forms

141 zontal lineO groups in the tetra-phosphonate calix[4]pyrrole cavitands are conformationally flexible,

142 ening dichloromethane barrier containing the calix[4]pyrrole conjugate, and a receiving basic aqueous

143 icture wherein the meso-substituted cytosine calix[4]pyrrole conjugate, but not its beta-linked conge

144 characterization of two cytosine-substituted calix[4]pyrrole conjugates, bearing the appended cytosin

145 /CD3OD, binding of fluoride anion within the calix[4]pyrrole core of 1 was not observed in the absenc

146 rrole side-arms suspended above or below the calix[4]pyrrole core.

147 than the previously reported bis-phosphonate calix[4]pyrrole counterparts in the complexation of both

148 A meso-p-nitroaniline-calix[4]pyrrole derivative trans-coordinated to a Pt(II)

149 ral data, the ion-pair receptor 1, bearing a calix[4]pyrrole for anion binding and calix[4]arene crow

150 hydrogen-bonding interactions between a bis-calix[4]pyrrole macrocycle and linear bis-amidepyridyl-N

151 ransfer polymerization is used to generate a calix[4]pyrrole methacrylate-derived copolymer.

152 Calix[4]pyrrole phosphonate-cavitands were used as recep

153 nd several alpha,alpha-isomers of "two-wall" calix[4]pyrrole receptors bearing two six-membered aroma

154 tive concentration of KF increases, then the calix[4]pyrrole subunit binds the F(-) anion.

155 describe recent results involving the use of calix[4]pyrrole systems for ion transport.

156 sphonate cavitands based on an aryl extended calix[4]pyrrole tetrol scaffold.

157 he phosphate anion-binding properties of the calix[4]pyrrole unit.

158 ce of both the trans-Pt(II) fragment and the calix[4]pyrrole unit.

159 ding energy between the halide anion and the calix[4]pyrrole was found to be about 7 kJ/mol larger fo

160 the use of the black-hole indicator dye, the calix[4]pyrrole was modified with a dansyl chromophore a

161 nted synthetic receptor, an aryl-substituted calix[4]pyrrole with a monophosphonate bridge, is report

162 t we could not detect the interaction of the calix[4]pyrrole with phosphate in the presence of water.

163 The calix[4]pyrrole's core features two additional pyrrole s

164 acetone bridging elements normally found in calix[4]pyrrole, is described.

165 that was enhanced relative to unsubstituted calix[4]pyrrole, was found to transport 5'-CMP roughly 4

166 the kite conformation both in free and bound calix[4]pyrrole-based cavitands.

167 A newly synthesized calix[4]pyrrole-based molecule is used as an ionophore f

168 An ion-pair receptor, the calix[4]pyrrole-calix[4]arene pseudodimer 2, bearing a s

169 The ion-pairing free energies between the calix[4]pyrrole-halide complex and the cesium cation are

170 our phosphonate groups at the upper rim of a calix[4]pyrrole-resorcin[4]arene hybrid scaffold.

171 recedented cavitands based on a meso-dodecyl-calix[4]pyrrole-resorcin[4]arene hybrid scaffold.

172 le and a bis(dinitrophenyl)-meso-substituted calix[4]pyrrole.

173 the formation of an ion-paired 1:1:1 cesium:calix[4]pyrrole:halide complex.

174 Isomeric "two-walled" calix[4]pyrroles (8a-10a and 8b-10b) were obtained in sa

175 Cage-type calix[4]pyrroles 2 and 3 bearing two additional pyrrole

176 bilayers facilitated by a series of strapped calix[4]pyrroles and show that these compounds facilitat

177 ectronic nature of the aromatic walls of the calix[4]pyrroles and the stability of the nitrate subset

178 The use of calix[4]pyrroles as building blocks for the preparation

179 hese examples serve to highlight new uses of calix[4]pyrroles as molecular containers.

180 The tetra-phosphonate calix[4]pyrroles exhibited larger affinity constants tha

181 Over the last two decades, calix[4]pyrroles have attracted considerable attention a

182 More recently, calix[4]pyrroles have found application as carriers, sys

183 e we show that two pyridine diamide-strapped calix[4]pyrroles induce coupled chloride anion and sodiu

184 um cation sandwiched between two cone shaped calix[4]pyrroles originating from separate receptor unit

185 Finally, the "two-wall" aryl-extended calix[4]pyrroles show excellent activity in ion transpor

186 hiophene containing "two-wall" aryl extended calix[4]pyrroles were synthesized for the first time, th

187 synthesis of porphyrins, corroles, chlorins, calix[4]pyrroles, porphodimethenes, BODIPY dyes and dipy

188 xoanion and several "two-wall" aryl-extended calix[4]pyrroles.

189 eometry of the nitrate anion included in the calix[4]pyrroles.

190 -CMP and 5'-GMP in the case of unsubstituted calix[4]pyrroles.

191 linylmethyl derivative of a tetra-sulfonated calix[4]resorcarene (1) is an effective chiral NMR solva

192 compounds form host-guest complexes with the calix[4]resorcarene in water.

193 Complexation of substrates with the calix[4]resorcarene is likely promoted by hydrophobic ef

194 bstrates have association constants with the calix[4]resorcarene larger than those of similar phenyl-

195 The effectiveness of a calix[4]resorcarene prepared from N-methyl-L-alanine (2)

196 of shielding from the aromatic rings of the calix[4]resorcarene, and several resonances in the 1H NM

197 trates with the prolinylmethyl groups of the calix[4]resorcarene.

198 Tetrafunctionalized calix[4]resorcinarene cavitands commonly serve as supram

199 A water-soluble calix[4]resorcinarene containing alpha-methyl-L-prolinyl

200 ciently enhance architectural complexity for calix[4]resorcinarene-containing metallo-supramolecules.

201 of shielding from the aromatic rings of the calix[4]resorcinarene.

202 Water-soluble calix[4]resorcinarenes containing 3- and 4-hydroxyprolin

203 gent is consistently the most effective, the calix[4]resorcinarenes with trans-4-hydroxyproline and t

204 nyl rings associate within the cavity of the calix[4]resorcinarenes, as do naphthyl rings with mono-,

205 A range of symmetric and asymmetric calix[4]tubes featuring either alkyl or phenyl substitue

206 Calix[5]- and calix[6]radialenes adopt in the crystal ir

207 Thus, calix[5]arene 1c, bearing tert-butyl groups at the wide

208 The affinity of amines for calix[5]arene derivatives 1a.H and 1b.H was probed by (1

209 Through-the-annulus threading of calix[5]arene penta-O-ethers by dialkylammonium cations

210 ration data show that preorganization of the calix[5]arene scaffold leads to great thermodynamic stab

211 The threading of the calix[5]arene wheels with the asymmetric pentylbenzylamm

212 yclic peri substituents give predominantly a calix[5]naphthalene with the corresponding 3,6-linkage.

213 for calix[8]-wheels 2 and 3, with respect to calix[6]-host 1a, due to the cooperative effect of their

214 lbenzylammonium axles 7(+) and 8(+) with the calix[6]-wheel 3 can occur by both routes of entering th

215 d water) and an anion dopant (para sulfonato calix[6]arene ((C[6]S)(-6))), on the manufacturing and p

216 8,39,40,41,42-hexakis(ethoxyc arbonylmethoxy)calix[6]arene (39), 5,11,17,23,29,35,41,47-octakis(chlor

217 ,41,42-hexakis(chlorosulfo nylphenoxyacetoxy)calix[6]arene (45), and 5,11,17,23,29,35,41,47-octakis(t

218 Calix[6]arene (HC6) and p-tert-butylcalix[6]arene (Bu(t)

219 diene (OND)-appended 1,3,5-tris conjugate of calix[6]arene (L2).

220 volving the less symmetrical 1,2,3-alternate calix[6]arene conformation, which implies a peculiar rot

221 of a meta-functionalized, inherently chiral calix[6]arene derivative.

222 Two new calix[6]arene derivatives 3 and 4 in a 1,4-anti conforma

223 The synthesis is described of calix[6]arene derivatives 4, 9, and 14 functionalized at

224 The calix[6]arene dianions show roughly the same structural

225 tio with M(2)CO(3) (M = K, Rb, Cs) to afford calix[6]arene dianions.

226 olic O-nucleophiles can be introduced at the calix[6]arene exo rim.

227 3) with the 1,3,5-trimethylether of the t-Bu-calix[6]arene in the presence of sodium hydride in THF i

228 o naphthalene moiety 1,3,5-triderivatives of calix[6]arene L1 and L2 have been synthesized and charac

229 o effective for the functionalization of the calix[6]arene macrocycle.

230 ratio of MOC(CH(3))(3) (M = Li, Na) to give calix[6]arene monoanions, but calix[6]arenes react in a

231 In addition, the reaction of a calix[6]arene p-bromodienone derivative with an actived

232 ]arene pKa(1) = 19.06 +/- 0.22, pKa(2) > 33; calix[6]arene pKa(1) = 15.59 +/- 0.06, pKa(2) = 23.85 +/

233 em possessing only one such unit without the calix[6]arene platform (L1) does not show any selectivit

234 centers possessing OND units present on the calix[6]arene platform, while a control molecular system

235 Calix[6]arene tris(thio)ureas, which possess a cavity th

236 More precisely, a calix[6]arene tris-carboxylic acid-based receptor bearin

237 rotaxanes composed of viologen-type axle and calix[6]arene wheel components.

238 ined with the native conformationally mobile calix[6]arene wheel, as a consequence of their higher de

239 The ipso-nitration of calix[6]arene-based molecular receptors is a important s

240 he extension of this synthetic strategy to a calix[6]arene-based receptor displaying a different reco

241 the straightforward synthesis of fluorescent calix[6]arene-based receptors 4a and 4b bearing three py

242 Examples of calix[6]arene-based systems using this strategy are rare

243 escribed that the host-guest properties of a calix[6]arene-based Zn complex could be exploited for it

244 NMR studies show that calix[6]arenes 4-6 behave as heteroditopic receptors tha

245 The alkali metal salts of monoanionic calix[6]arenes are more conformationally flexible than t

246 Calix[6]arenes bearing adamantyl groups at the exo-rim f

247 Calix[6]arenes bearing endo-OH functions give rise to a

248 Calix[6]arenes disubstituted at the methylene bridges, w

249 g of conformationally stable 1,2,3-alternate calix[6]arenes is unprecedented in the literature.

250 i, Na) to give calix[6]arene monoanions, but calix[6]arenes react in a 1:1 molar ratio with M(2)CO(3)

251 conveys an advantage, as the cotransport by calix[6]arenes was observed to be more efficient than th

252 n-type axles afforded by tris(N-phenylureido)calix[6]arenes, enables a strict directional control of

253 ble than the alkali metal salts of dianionic calix[6]arenes, which has been shown by their solution N

254 The immobilization of a copper calix[6]azacryptand funnel complex on gold-modified elec

255 to be the method of choice for grafting the calix[6]azacryptand onto the monolayers.

256 Calix[5]- and calix[6]radialenes adopt in the crystal irregular altern

257 In a protic environment, calix[6]tube 4 binds DOPC much more strongly than 5 and

258 Two giant calix[n]phyrin derivatives namely calix[8]- (4) and calix[16]phyrin (5), involving two and

259 Dynamic NMR studies on calix[8]-pseudorotaxanes evidenced a direct correlation

260 e endo-benzyl one, was observed by threading calix[8]-wheel 3 with the directional n-butylbenzylammon

261 eaded into one of the two subcavities of the calix[8]-wheel.

262 eudorotaxane K(ass) values were obtained for calix[8]-wheels 2 and 3, with respect to calix[6]-host 1

263 2,53,54,55,56-oct akis(ethoxycarbonylmethoxy)calix[8]arene (40), 5,11,17,23-tetrakis(tert-butyl)-25,2

264 ,55,56-octakis (chlorosulfonylphenoxyacetoxy)calix[8]arene (46) were synthesized by two different mul

265 Calix[8]arene (HC8) and p-tert-butylcalix[8]arene (Bu(t)

266 0 on gold surfaces was achieved with SAMs of calix[8]arene derivative 5 but not with those of 1-4.

267 s 3 and 4 in a 1,4-anti conformation and one calix[8]arene derivative 5 were synthesized.

268 through-the-annulus threading of the larger calix[8]arene macrocycle with di-n-alkylammonium cations

269 urs only upon partial preorganization of the calix[8]arene macroring by intramolecular bridging.

270 0.06, pKa(2) = 23.85 +/- 0.35, pKa(3) > 33; calix[8]arene pKa(1) = 17.20 +/- 0.20, pKa(2) = 20.32 +/

271 during the formation of calix[4]arenes from calix[8]arenes are included.

272 d high yield synthesis for the production of calix[8]arenes in concentrated reaction masses is descri

273 In particular, 1,5-bridged calix[8]arenes with a meta- or para-xylylene bridge (2 a

274 model in which the Cs+ cation resides in the calix bowl.

275 de and characterized: 2, cis-Rh(2)(DAniF)(2)(calix)(CH(3)OH), and 3, cis-Mo(2)(DAniF)(2)(calix).

276 olecular tweezers, clips, cavitands, clefts, calixes, etc.

277 pic studies, however, provide evidence that [Calix-HBut(OH)2(O)2]W(PMe3)3H3 is in equilibrium with it

278 ixture of [CalixBut(OH)2(O)2]W(PMe3)3H2 and [Calix-HBut(OH)2(O)2]W(PMe3)3H3 with D2.

279 n complex exists as a metallated trihydride [Calix-HBut(OH)2(O)2]W(PMe3)3H3.

280 enzene rings and the macrocyclic ring of the calix in a single transformation.

281 DeltaG(ass)) values and energy barriers for calix inversion due to the effectiveness of thread templ

282 However, due to the calix-like shape, the structural diversity of assemblies

283 SAMs of calix[n]arene (n = 4, 6, 8) derivatives 1-5 were formed

284 l and solution conformation determination of calix[n]arenes (n = 4, 6, 8) is reported.

285 The preparation of calix[n]naphthalenes from derivatives of 2,7-dihydroxyna

286 Two giant calix[n]phyrin derivatives namely calix[8]- (4) and cali

287 the excitons depends on the specifics of the calix[n]phyrin structure, not just its size.

288 Calix[n]phyrins 4 and 5 display extremely high extinctio

289 The anion binding properties of fluorinated calix[n]pyrroles (n = 4-6) in aprotic solvents (acetonit

290 Similar analyses of the fluorinated calix[n]pyrroles revealed an increase in the relative af

291 imination of water yielded the corresponding calix[n]radialenes.

292 ctrochemical study indicated that dithia-bis(calix)-sapphyrins are relatively easier to reduce but di

293 ic shifts observed for protonated dithia-bis(calix)-sapphyrins macrocycles.

294 However, the protonated dithia-bis(calix)-sapphyrins showed large bathochromic shifts in th

295 that the electronic properties of dithia-bis(calix)-sapphyrins were altered significantly upon proton

296 The DBF/DBT-embedded dithia-bis(calix)-sapphyrins were characterized by HRMS (high-resol

297 )/dibenzothiophene (DBT)-embedded dithia-bis(calix)-sapphyrins were synthesized by condensing 1 equiv

298 graphic purification afforded new dithia-bis(calix)-sapphyrins with two meso-sp(3) carbons in 5-7% yi

299 significantly upon protonation of dithia-bis(calix)-sapphyrins.

300 calix[2]pseudorotaxane isomers in which the calix-wheel adopts 1,2,3-alternate and cone conformation