Stereospecific Synthesis of α-Amino Allylsilane Derivatives through a [3,3]-Allyl Cyanate Rearrangement. Mild Formation of Functionalized Disiloxanes
作者:Sylvain Henrion、Bertrand Carboni、Fernando P. Cossío、Thierry Roisnel、Jose M. Villalgordo、François Carreaux
DOI:10.1021/acs.joc.6b00505
日期:2016.6.3
as carbamate derivatives. A computational study was conducted to rationalize the complete 1,3-chirality transfer of this kind of rearrangement. Moreover, starting from products bearing a phenyldimethyl silylsubstituent, the α-amino silane derivatives or the corresponding disiloxanes can be obtained under hydrogenation conditions in an exclusive way according to the used catalyst.
alpha-(trimethylsilyl)methyl-beta-hydroxysulfoxides with high stereoselectivity. The stereoselective reaction was demonstrated to proceed through a dynamickineticresolution pathway via a six-membered cyclic transition state involving Si-O interaction. These reactions provide a convenient route for the synthesis of optically pure allylic alcohols.
Allylsilanes in organic synthesis; Stereoselective hydroxylactonisation of chiral amide-allylsilanes
作者:Andrew T. Russell、Garry Procter
DOI:10.1016/s0040-4039(00)96040-4
日期:1987.1
The amide-allylsilanes (1) and (10) undergo stereoselective hydroxylactonisation on treatment with m-CPBA, the major products from (1) and (10) were converted into parasorbic acid (9) and the carpenter bee pheromone (13) respectively.
Palladium-Catalysed Intramolecular Cyclisations of Olefinic Propargylic Carbonates and application to the diastereoselective synthesis of enantiomerically pure (?)-?-thujone
Intramolecular [Pd2(dba)3]/tri(2-furyl)phosphine-catalysed (dba = dibenzylideneacetone, PhCHCHCOCHCHPh) cyclisations of olefinic propargylic carbonates I provided alk-1-enyl-(3-aza)bicyclo[3.1.0]-hexanes VIII in good yields. A palladium cascade sequence I II III IV VII VIII is proposed. Furthermore, chiral propargylic carbonates such as 23, 24 and 25 allowed diastereoselective formation of bicyclo[3
烯烃炔丙基碳酸酯的分子内[Pd 2(dba)3 ] /三(2-呋喃基)膦催化的(dba =二亚苄基丙酮,PhCHCHCOCHCHPh)环化反应,我提供了烷基-1-烯基-(3-氮杂)双环[3.1.0] -己烷八良好收益。提出了钯级联序列I II III IV IV VII VIII。此外,手性炔碳酸盐如23,24和25允许的非对映选择性形成二环[3.1.0]己烷29,30和31, 分别。单萜的第一非对映选择性合成,( - ) - α-侧柏酮40示出了该方法的潜力。
Lipase mediated resolution of chiral (E)-vinylsilanes: an improved procedure for the production of (R)- and (S)-(E)-1-trialkylsilyl-1-buten-3-ol derivatives
作者:Michelle A. Sparks、James S. Panek
DOI:10.1016/s0040-4039(00)79869-8
日期:1991.8
A crude enzymic extract of Pseudomonas AK in pentane catalyzes the transesterification of chiral (E)-vinylsilanes 1, resulting in the production of highly enantiomerically enriched (R)- and (S)-(E)-1-trialkylsilyl-1-buten-3-ol derivatives (S)-2 and (R)-3. A series of related vinylsilanes and two-different lipases have been screened to identify optimal reaction conditions.