ライフサイエンスコーパス: hypervalent

1 erve as activators for transmetalation via a hypervalent 10-Si-5 siliconate intermediate.

2 n which the radicals are linked laterally by hypervalent 4-center 6-electron S...S-S...S sigma-bonds.

3 Irradiation in the solid state of the hypervalent 4c-6e S...S-S...S bridged sigma-dimer of a b

4 Halogenoalkynes, hypervalent alkynyliodoniums, acetylene sulfones and in

5 On the basis of hypervalent alpha-aryliodonio diazo triflate salts 1A, 2

6 Hypervalent ammonium radicals produced by electron captu

7 Palladium-catalyzed cross-coupling of hypervalent arylsiloxane derivatives proceeded in good t

8 d to the outcome described here of a central hypervalent atom bound on one face by a small cyclic car

9 derivatives, thus breaking the sulfur-sulfur hypervalent bond that is always found in this kind of co

10 In hypervalent bonding (HVB), secondary bonding (SB) and hy

11 Hypervalent bonding ensues.

12 The combination of strain and hypervalent bonding, and the way they work in concert to

13 by analogy with three-orbital four-electron "hypervalent" bonding picture in such molecules as I(3)(-

14 Recent discovery of hypervalent catalytic systems and recyclable reagents, a

15 )(-) system; (iii) the formation of a Fe(IV) hypervalent compound may be essential for heme(Fe)-catal

16 eight-electron configuration in [1](+) to a hypervalent configuration in 2.

17 ol of ethyl acetoacetate was developed using hypervalent diaryliodonium salts under mild and metal-fr

18 h tripnictides, the ability to accommodate a hypervalent electron count is the largest in the middle

19 )Cl(3)(o-dppp)(2) (2), a complex combining a hypervalent four-coordinate tellurium atom and an octahe

20 ormation of the fluorophenylgermanes and the hypervalent germanate species as possible intermediates.

21 bitors, despite their efficiency at reducing hypervalent haem iron.

22 apparent rate constants for the reduction of hypervalent haem pigment ferrylmyoglobin (MbFe(IV)O) by

23 ity of stable nitroxide radicals to detoxify hypervalent heme proteins such as ferrylmyoglobin (MbFeI

24 2 evolution and providing protection against hypervalent heme proteins.

25 [F-H-F](-), can be considered as containing hypervalent hydrogen.

26 halide), that undergo rapid homolysis of the hypervalent I-X bonds and generate (pseudo)halide radica

27 In this study, hypervalent interactions are shown to provide colloidal

28 ploiting the ability of silicon to engage in hypervalent interactions with hard donor molecules.

29 e bonds at the phosphorus center, suggesting hypervalent involvement of extra-valence d-orbitals in t

30 Novel, original protocols include the use of hypervalent iodide carboxylates alone or in conjunction

31 ines the structure-property relationship for hypervalent iodide carboxylates and halide initiators in

32 Saponification of arnottin I and hypervalent iodide mediated spirocyclization provided an

33 The use of oxidants such as hypervalent iodine (e.g., ArIO), peracids (e.g., m-CPBA)

34 routes: (1) a Cu(OTf)2 (0-5 mol %) catalyzed hypervalent iodine [PhI(OTf)2] mediated oxidative coupli

35 A thiol-alkynylation procedure utilizing the hypervalent iodine alkyne transfer reagent TIPS-ethynyl-

36 des onto tethered, unactivated alkenes using hypervalent iodine and Bronsted acids.

37 ntramolecular I...O interactions between the hypervalent iodine center and the sulfonyl oxygens in th

38 ularly important achievement in the field of hypervalent iodine chemistry.

39 ins was accomplished using palladium(II) and hypervalent iodine co-catalysis.

40 The hypervalent iodine co-catalyst was found to be critical

41 irst example of a structurally characterized hypervalent iodine compound with a relatively short iodi

42 These hypervalent iodine compounds are potentially valuable ox

43 The preparation, structure, and chemistry of hypervalent iodine compounds are reviewed with emphasis

44 ntific community as to the benefits of using hypervalent iodine compounds as an environmentally susta

45 The ring and I: hypervalent iodine compounds avoid the issues of toxicit

46 O, N, C) bonding was analyzed in the related hypervalent iodine compounds based on the adaptive natur

47 new enantioselective reactions using chiral hypervalent iodine compounds represent a particularly im

48 ulation of the electronic structure of these hypervalent iodine compounds would be useful in establis

49 d phenyliodine(III) diacetate (PIDA) through hypervalent iodine mediated C(sp2)-C(sp2) bond formation

50 iron(0) complexes has been achieved with the hypervalent iodine oxidant PIFA which was shown to be co

51 organic solvents and is a potentially useful hypervalent iodine oxidant.

52 ion) of indole in water in the presense of a hypervalent iodine oxidant.

53 afford complex reaction mixtures with other hypervalent iodine oxidants.

54 Morita-Baylis-Hillman adducts mediated by a hypervalent iodine reagent (IBX) to form beta-ketoesters

55 dative phenol dearomatizations mediated by a hypervalent iodine reagent and includes a novel route to

56 fluoromethylation with a trifluoromethylated hypervalent iodine reagent in the presence of CuCN.

57 by reaction of the terminal alkyne with the hypervalent iodine reagent PhI(OAc)NTs(2) within a singl

58 n oxidative ipso-rearrangement mediated by a hypervalent iodine reagent that enables rapid generation

59 ed in situ in the presence of methanol and a hypervalent iodine reagent to form an active iminium spe

60 ive 1,2- and 1,3- alkyl shifts mediated by a hypervalent iodine reagent were performed on simple and

61 initiated by a combination of the Pd(II) and hypervalent iodine reagent, Dess-Martin periodinane to g

62 A hypervalent iodine reagent-based alpha-carbonyl dihaloge

63 ctron density on the aryl substituent of the hypervalent iodine reagent.

64 n is that the use of catalytic quantities of hypervalent iodine reagents (phenyliodine diacetate or D

65 ited for large scale preparations of the two hypervalent iodine reagents 1 and 2 for electrophilic tr

66 lpha-alkynylation of acyclic aldehydes using hypervalent iodine reagents and borohydride reduction.

67 The role of hypervalent iodine reagents as oxidants has been widely

68 ldehyde autoxidation to aerobically generate hypervalent iodine reagents for a broad array of substra

69 yl ureas employing chiral, lactic acid-based hypervalent iodine reagents gives a facile synthesis of

70 ods based on electrophilic alkynylation with hypervalent iodine reagents have made acetylene synthesi

71 ding BP phenols by direct oxidation with the hypervalent iodine reagents IBX or TBI.

72 Synthetic uses of hypervalent iodine reagents in halogenation reactions, v

73 The use of the hypervalent iodine reagents in oxidative processes has b

74 aromatization conditions were attained using hypervalent iodine reagents instead of Pb(OAc)4.

75 Defined hypervalent iodine reagents of the general structure PhI

76 Novel electron-deficient chiral hypervalent iodine reagents were prepared in good overal

77 We anticipate that aerobically generated hypervalent iodine reagents will expand the scope of aer

78 Here, we generate hypervalent iodine reagents-a broadly useful class of se

79 ated derivatives by using gold catalysis and hypervalent iodine reagents.

80 of thiols using ethynyl benziodoxolone (EBX) hypervalent iodine reagents.

81 This reaction involves hypervalent iodine species generated in situ from cataly

82 catalytic systems based on the generation of hypervalent iodine species in situ are also overviewed.

83 The chiral hypervalent iodine species is generated in situ from a c

84 anoparticles are selectively oxidized by the hypervalent iodine species PhICl(2), and catalyse a rang

85 oacetate esters is achieved by a homogeneous hypervalent iodine(III) complex in non-superacidic (trif

86 that relies on the chemistry of spirocyclic hypervalent iodine(III) complexes, which serve as precur

87 ide, cyanate, and bromide) to yield unstable hypervalent iodine(III) compounds, PhIX2 (X = (pseudo)ha

88 yl-D-glucal 10, which removes the need for a hypervalent iodine(III) oxidant, we provide evidence for

89 ofluorination on the distinctive spirocyclic hypervalent iodine(III) precursor to give (18)F-fluorobe

90 The reaction employs a hypervalent iodine(III) reagent as an oxidant and bistos

91 The hypervalent iodine(III) reagent-induced the direct intra

92 ng to a new type of sulfoximidoyl-containing hypervalent iodine(III) reagents in high yields.

93 ic parameters on the reaction performance of hypervalent iodine(III) reagents in the vicinal diaminat

94 eaction of N-(biphenyl)pyridin-2-amines with hypervalent iodine(III) reagents is investigated.

95 Hypervalent iodine(iii) reagents, which have already pro

96 odoxybenzoic acid (IBX), a readily available hypervalent iodine(V) reagent, was found to be highly ef

97 Iodoxybenzoic acid (IBX), a highly versatile hypervalent iodine(V) reagent, was found to efficiently

98 pective summarizes synthetic applications of hypervalent iodine(V) reagents: 2-iodoxybenzoic acid (IB

99 unusually beneficial solvent for undertaking hypervalent iodine-initiated [2+2] cycloaddition of styr

100 cycloisomerization, and another employing a hypervalent iodine-mediated de-aromatizing cyclization o

101 as generated by the reaction of azide with a hypervalent iodonium alkynyl triflate and reacted in sit

102 metal-free (18)F-labeling method that uses a hypervalent iodonium(III) ylide precursor, to prepare th

103 ptical spectrum of the ferric enzyme with no hypervalent iron intermediates detected.

104 idence from several laboratories points to a hypervalent iron-oxenoid species in P450-catalyzed oxyge

105 e first examples of complexes that feature a hypervalent kappa(2)-H2-H2SiPh2H silyl ligand and a chel

106 achieved under the Kita conditions using the hypervalent PIFA/BF3 reagent.

107 to affect the reactivity of the iodine-based hypervalent reagents.

108 e time, we find a remarkable affinity of the hypervalent region to planarity for all reaction mechani

109 We further propose that hypervalent silicates form ion-pairs with pentanidinium

110 Oxidative [1,2]-Brook rearrangements via hypervalent silicon intermediates induced by photoredox-

111 Arylations using tin and hypervalent silicon reagents were compared.

112 potassium graphite reduction of the neutral hypervalent silicon-carbene complex L:SiCl4 {where L: is

113 Ph2SiH2 to afford a variety of novel silyl, hypervalent silyl, silane, and disilane complexes, as re

114 of the Sn net with other main group element hypervalent slabs.

115 d on the extension of the sigma-bond, in the hypervalent species our DFT calculations reveal the form

116 dure enables the easy aryl transfer from the hypervalent species under mild catalytic conditions with

117 oteins may be attributed to the formation of hypervalent states of the heme iron.

118 rtunities provided by this exciting class of hypervalent substances.

119 on deficient to hypercoordinate and formally hypervalent, the p-block elements represent an area to f

120 like fragment [Re2Cl4]2+ is modified by four hypervalent three-center/four-electron additions.

121 In this sense, Cs(+) resembles hypervalent Xe.