ライフサイエンスコーパス: protic

1 The isomerization is promoted by protic acid and active palladium catalyst.

2 The bifunctional chiral protic acid catalyst enables these reactions to proceed

3 ed to tryptamines Xa and Xb under controlled protic acid conditions.

4 When those materials are treated with protic acid in anhydrous solvent, the cinnamyl unit migr

5 increase in acidity of an exceedingly strong protic acid is greater for biscoordinating TiCl4 and SnC

6 ate experimentally observed when an external protic acid is used is attributed to the strong decrease

7 oxyseptanoside 10 as the only product during protic acid mediated elimination reactions.

8 In the presence of protic acid, bridged structures such as 6 are formed rea

9 Under protic acid-mediated dehydrative aromatization condition

10 yama macrolactonization as well as Lewis and protic acid-promoted deprotections carefully designed to

11 Compared to earlier work on the protic acid-promoted intramolecular Schmidt reaction of

12 tion of aromatic amines that are promoted by protic acid.

13 followed by a catalytic amount of an achiral protic acid.

14 ith a peroxyacid in the presence of a strong protic acid.

15 The high protic acidity promised by large absolute values of the

16 of composition {CdSe[n-octylamine]0.53} and protic acids HX (X = Cl, Br, NO3, acetate (OAc), and ben

17 (2), it was discovered that (i) HF and other protic acids inhibit each of the 12 fluorination steps (

18 ngement to methyl isopropyl ketone in strong protic acids involving a reactive protosolvated superele

19 le) connecting the catalytic power Lewis and protic acids.

20 efficient substitute for nonoxidizing strong protic acids/superacids.

21 Here we show that the introduction of the protic additive phenol to ethers can promote a solution-

22 Benzoic acid and other protic additives (H2O, ArOH) catalyze the oxygenation re

23 While various protic additives could be used to promote the transforma

24 kinetics using NaBH4 accompanied by various protic additives, have been discussed.

25 haracter of both nonsolvents, where only the protic alcohols can provide the protons needed to desorb

26 -tetramethylethylenediamine, Et2O, pyridine, protic amines, alcohols, and highly dipolar aprotic solv

27 suitability of the hydrogen-bonding model in protic and aprotic conditions as well as under basic and

28 MB as the substrate are investigated in both protic and aprotic organic media, showing different colo

29 e models that recognize pyrimidine dimers in protic and aprotic organic solvents as well as in water

30 otonated Schiff base of all-trans retinal in protic and aprotic solvents was studied by multipulse ul

31 rimental rates and differentiate between the protic and aprotic solvents.

32 measurements on [Ru(bpy)(2)dppz](2+) in both protic and aprotic solvents.

33 H-bonds in ILs (both protic and aprotic) are bifurcated and chelating, and un

34 een investigated using QM/MM calculations in protic and dipolar aprotic solvents.

35 Both the polar-protic and dipolar-aprotic solvents resulted in signific

36 Similar chemistry can also be achieved for protic and hydridic E-H bonds (N-H/O-H, Si-H/B-H, respec

37 reactivity of this "hydride", however, shows protic and not hydridic behavior.

38 red liquid as well as its nature as a polar, protic, and amphoteric reagent.

39 cluded compounds containing anionic, neutral protic, and cationic peripheral substituents and various

40 and apolar regions on one hand and dipolar, protic, and positively charged on the other.

41 ups, and it showed high performance in polar protic/aprotic media, including aqueous buffer systems.

42 macopieal dissolution system with a standard protic buffer.

43 en elimination involving direct elimination, protic catalysts, or binuclear mechanisms and shows that

44 double dagger)(OH) approximately K(NPP) for "protic" catalysts (Co(NH(3))(6)(3+), Co(en)(3)(3+), guan

45 The protic-, chloro-, and anti iodo-imidazoliophane receptor

46 gh propargylic hydride migration followed by protic cleavage of the resultant vinylruthenium intermed

47 Impurities include residual protons and protic compounds that can react with oxygen species, suc

48 he ketone/sulfine ratio can be reversed when protic conditions and high thioketone concentrations are

49 to aryl aldehydes under polar, nonpolar, and protic conditions using both rate data and two isotope e

50 Under protic conditions, two different intermediates are forme

51 ox products were not observed despite of the protic conditions.

52 ample preparation methods, the addition of a protic cosolvent to the sample solutions was shown to br

53 l-3-methylimidazolium, X = BF(4), PF(6)) and protic (DEAS = diethanolamine hydrogen sulphate; DEAP =

54 and nonpolar organosilanes as well as polar-protic, dipolar-aprotic, and nonpolar solvents were inve

55 duces reactive carbonyl anions in a buffered protic environment that readily undergo conjugate additi

56 In a protic environment, calix[6]tube 4 binds DOPC much more

57 monium sulfate salts was also evidenced in a protic environment.

58 se sites that make the cluster reactive in a protic environment.

59 he 6DMN fluorescence is red-shifted in polar protic environments, with the maximum emission intensity

60 ided that the acetylene derivative carries a protic functional group.

61 The base-free conditions have exceptional protic group tolerance on both partners, permitting the

62 common dimethacrylates (DMAs) containing no protic groups into unsaturated polyesters.

63 tem capable of the cooperative activation of protic, hydridic and apolar HX bonds across a Group 13 m

64 difference in the 1H NMR chemical shift of a protic hydrogen in DMSO and CDCl3 solvents is directly r

65 tion-metal or main-group hydride (M-H) and a protic hydrogen moiety (H-X)-is arguably the most intrig

66 For 54 compounds, the observed shifts for 72 protic hydrogens could be correlated to the Abraham solu

67 the determination of A values for individual protic hydrogens in multifunctional solutes.

68 resh look on the Grotthuss-type mechanism in protic ionic glasses as well as provide new ideas for th

69 haviour of sucrose in aqueous solutions of a protic ionic liquid (3-hydroxypropylammonium acetate) ha

70 idodecyldimethylammonium bromide, DDAB) in a protic ionic liquid (ethylammonium nitrate, EAN).

71 Further, the effect of protic ionic liquid on the taste behaviour of sucrose ha

72 Here we study systems in which protic ionic liquid second components dissolve ideally i

73 he strength of the solvophobic effect in the protic ionic liquid.

74 Protic ionic liquids (PILs) are currently being shown to

75 We demonstrate protic ionic liquids (PILs) as effective p-dopant in bot

76 ormed under electrochemical conditions using protic ionic liquids as solvent for lignin.

77 nd a great similarity of alkylammonium-based protic ionic liquids to liquid water.

78 Such "protic ionic liquids" exhibit a wide range of thermal st

79 hylimidazolium hexafluorophosphate), and two protic ionic liquids, (bis(2-hydroxyethyl)ammonium aceta

80 d-based ionic liquids, such as acetate-based protic ionic liquids, where the widely used Karl Fischer

81 electrons in the near-interfacial region of protic liquids.

82 ivity of alpha,n-didehydrotoluenes (DHTs) in protic media (organic/aqueous mixtures) was explored by

83 rolytic photoactivation of the Ar-Cl bond in protic media and the generation of phenyl cations.

84 apture small and potentially toxic anions in protic media has sparked a renewed interest in the synth

85 solvents and of hydrophobic interactions in protic media in agreement with the experimental spectros

86 In addition, running the reaction in protic media leads to the reduced product resulting from

87 The mechanism of the oxidation in protic media was either one- or two-electron, depending

88 ar and nonpolar aprotic solvents and also in protic media with the aim of controlling nitrogen neighb

89 as high as 10(8) s(-1), even in unfavorable protic media, are described.

90 rious ortho-methylamino arylboronic acids in protic media.

91 ible for the observed rate enhancements over protic media.

92 by oxoiron(IV) porphyrin cation radicals in protic media.

93 orth-type rearrangement occurring in neutral protic medium or under acid conditions.

94 conversion of 1-QM to an inactive indene in protic medium.

95 nsive study investigated the effect of polar protic (methanol and water) and polar aprotic (acetonitr

96 short HH distance of 1.489(10) A between the protic N-H(delta+) and hydridic Fe-H(delta-) part.

97 t the N(7/9)-atom yields complexes bearing a protic N-heterocyclic carbene ligand derived from the pu

98 s increase in response was attributed to the protic nature of methanol and the elution of compounds i

99 We interpret this difference in terms of the protic or aprotic character of both nonsolvents, where o

100 rm Ag(I) halide precipitates irrespective of protic or aprotic solvents.

101 thermal reaction conditions; in some cases, protic or Lewis acids accelerate these reactions.

102 ism for optical anion sensing in competitive protic organic and aqueous-organic media.

103 MPO, interacting with the common aprotic and protic polar solvents, CH3CN and CH3CONH2, yielding a pr

104 dely available, stable alpha-keto esters and protic pronucleophiles is described (see scheme; X = OR,

105 ble resistance to attack by nucleophilic and protic reagents.

106 determine whether any of the other conserved protic residues is directly involved in the hydratase ca

107 Finally, properly positioned protic sites lead to a substantially increased substrate

108 ion reaction that, from a single compound in protic solution, results in an equilibrium mixture of fo

109 oxime complexes catalyze H(2) evolution from protic solutions at modest overpotentials.

110 ations considering the effect of a polar and protic solvent (methanol), of a polar and aprotic solven

111 nitromethane and by the poorly nucleophilic protic solvent acetic acid.

112 and products in aprotic solvent, whereas in protic solvent almost full conversions were reached.

113 ong-lived to be characterized by 2D NMR in a protic solvent at ambient temperature.

114 yrroles in the presence of primary amines in protic solvent at ambient temperatures suggests that cov

115 and 67:33, respectively), and the use of the protic solvent ethanol resulted in reversal of the regio

116 -picoline borane as the reducing agent and a protic solvent for the reaction media and has been succe

117 enols to DPPH radical in a non-polar and non-protic solvent have been measured and were found to be i

118 The resulting polar protic solvent promoted homologation afforded benzylic k

119 of microtubule-bound N-AB-PT was within the protic solvent region, demonstrating that microtubule-bo

120 QMP 9 in a protic solvent undergoes two competitive processes, phot

121 changed from dimethyl sulfoxide/methanol (a protic solvent) to dimethyl sulfoxide (a strongly polar

122 In protic solvent, a molecule of solvent inserts between th

123 upon photoexcitation of 4-6 to S1 in a polar protic solvent, proton dissociation from the phenol, cou

124 In a protic solvent, QMP 6-8 undergo solvent-assisted PT givi

125 kcal/mol and increased by 1.7 kcal/mol in a protic solvent, trifluoroethanol.

126 onstants for each of the individual steps in protic solvent.

127 e solubility of this hemicarceplex in polar, protic solvents (e.g., MeOH).

128 Highly polar protic solvents (hexafluoroisopropanol) favor the format

129 nd have higher fluorescent quantum yields in protic solvents (methanol and water) than the Zn(II)-Pcs

130 ould be obtained only when short alkyl chain protic solvents (methanol or ethanol) and a nonhydrophob

131 terization, it displayed little stability in protic solvents (t(1/2) = 0.19 h at pH 3, t(1/2) = 0.20

132 ng a "hydrophobic collapsed" conformation in protic solvents and an "extended" conformation in aproti

133 study and measure OH-pi interactions between protic solvents and aromatic surfaces.

134 tone enols point to their high reactivity in protic solvents and explain why no lactone enols have be

135 -hydroxysuccinimide esters are not stable in protic solvents and many biological ligands that would b

136 a of pi-conjugated heterocyclic compounds in protic solvents and other H-bonding environments also il

137 9 has a lifetime of approximately 3000 ns in protic solvents and returns to the starting material thr

138 formation of OH-pi interactions between the protic solvents and the exposed aromatic surfaces in the

139 ree energies of activation for the two polar protic solvents and the gas phase.

140 t transfer of the isocyanide alpha-carbon to protic solvents as a formyl group during imine formation

141 ds, APTES-capped PNCs show high stability in protic solvents as a result of the strong steric hindran

142 (ISC) to the triplet nitrene in aprotic and protic solvents as well as protonation to form the nitre

143 nalyses confirm that the rate retardation in protic solvents comes from loss of hydrogen bonding in p

144 ty of the hydrogen-bonded capsule 1.1 toward protic solvents depends strongly on the guests, with the

145 Protic solvents displayed systematically weaker solvopho

146 mple washing of the resulting materials with protic solvents disrupts the supramolecular association

147 Polar protic solvents exhibited the highest content of total p

148 The irradiation in protic solvents of 4-chloroalkylbenzenes and 4-chlorophe

149 Binary mixtures of protic solvents show specific interaction effects with r

150 h solvent-derived deuterons in perdeuterated protic solvents such as D(2)O and CD(3)OD.

151 ons (SRI) are prominent in MC ESI spectra in protic solvents such as HPLC grade methanol.

152 arried out in the presence of water or other protic solvents such as methanol.

153 Guest encapsulation in polar protic solvents such as water appears to be driven by in

154 occurs at a 0.2-A shorter C-N separation in protic solvents than in acetonitrile.

155 es in nucleophilic substitution reactions in protic solvents than in aprotic solvents.

156 uted analogues appear to be more affected by protic solvents than the other analogues.

157 ylamino)pyridine, was studied in aprotic and protic solvents using femtosecond-to-microsecond transie

158 On excitation in polar protic solvents, 2-4 populate charge-transfer states lea

159 he reactions are tolerant of the presence of protic solvents, and approximately 85% of the indium met

160 XB acceptor, due to desolvation penalties in protic solvents, as shown for a tetraquinuclidine XB acc

161 Pc significantly increases its solubility in protic solvents, but a centrally chelated silicon ion an

162 en weak acids (such as ammonium chloride) or protic solvents, can induce racemization, too.

163 to statistical (gauche/trans = 2/1) in other protic solvents, e.g., alcohols.

164 d easy to handle co-oxidant, and fluorinated protic solvents, highly substituted 1-naphthalenones cou

165 In protic solvents, intermolecular interactions appear to d

166 rom tocopheryl radical, whereas in polar and protic solvents, like methanol, no regeneration is obser

167 nging assay carried out in non polar and non protic solvents, such as toluene, BHT regenerates alpha-

168 In protic solvents, the open dipolar intermediate may proce

169 In protic solvents, the shifts are larger because of hydrog

170 However, the RE of CH3Cl is faster in polar protic solvents, which argues in favor of a concerted C-

171 Polar-protic solvents, which have high dielectric constants, r

172 increased linearly with solvent polarity in protic solvents, which is expected due to the nature of

173 ytic cleavage (tau = 108 ps) was observed in protic solvents, while intersystem crossing was observed

174 arameters N and s(N) for fluoride in various protic solvents.

175 e allylindium intermediates to hydrolysis in protic solvents.

176 ition of monosaccharides in apolar and polar protic solvents.

177 overall and proceeded more rapidly in polar, protic solvents.

178 ogen-bonded capsule 1.1 and its complexes in protic solvents.

179 s by complete dissociation of the capsule in protic solvents.

180 offset the stronger solvophobic effects for protic solvents.

181 of a stoichiometric amount of base in polar protic solvents.

182 e unbound analogues form hydrogen bonds with protic solvents.

183 igh thermal and photochemical stabilities in protic solvents.

184 ed by 30 min sonication, especially in polar protic solvents.

185 salts with catalytic amounts of chloride in protic solvents.

186 and 6 show strong fluorescence quenching in protic solvents.

187 ation on both length scales via rinsing with protic solvents.

188 trene are separated by a small energy gap in protic solvents.

189 ereas an "inverse" gap effect is observed in protic solvents.

190 limits of detection are achieved with polar protic solvents.

191 case in which cyclization was spontaneous in protic solvents.

192 trans) using NMR spectroscopy in aprotic and protic solvents.

193 LutHCl dissociates to give HCl as the active protic source for C-F bond activation.

194 class of ruthenium alkylidenes provided that protic species are available in solution and that the di

195 y a rapid protonation of 3 by water or other protic species.

196 A nascent hydrogen bridge between the protic substituent and the polarized [Ru-Cl] unit impose

197 bond to engage in hydrogen bonding with the protic substituent, which helps upload, activate, and lo

198 n the surface charge of silica, an archetype protic surface with a pK value similar to that of acidic

199 large rate accelerations in progressing from protic to dipolar aprotic media.

200 The protic version, typically employing trifluoromethanesulf

201 eties, substituents, and leaving groups) and protic vs aprotic solvation.