Synthesis of highly enantio-enriched allylsilanes via palladium-catalyzed intramolecular bis-silylation. Determination of the enantiomeric excesses through regio- and stereoselective hydroboration with 9-BBN
作者:Michinori Suginome、Taisuke Iwanami、Akira Matsumoto、Yoshihiko Ito
DOI:10.1016/s0957-4166(97)00073-6
日期:1997.3
enantio-enriched (E)-allylsilanes were synthesized by palladium-catalyzed intramolecularbis-silylation of chiral allyl alcohols and subsequent Peterson-type elimination with organolithium reagents. The enantiomeric excesses of the allylsilanes were determined after hydroboration with 9-BBN followed by oxidation, revealing remarkably high stereospecificity for the present synthesis.
New Synthesis of (<i>E</i>)-Allylsilanes with High Enantiopurity via Diastereoselective Intramolecular Bis-Silylation of Chiral Allylic Alcohols
作者:Michinori Suginome、Akira Matsumoto、Yoshihiko Ito
DOI:10.1021/ja954251x
日期:1996.1.1
Stereoselective Synthesis of Highly Enantioenriched (E)-Allylsilanes by Palladium-Catalyzed Intramolecular Bis-Silylation: 1,3-Chirality Transfer and Enantioenrichment via Dimer Formation
作者:Michinori Suginome、Taisuke Iwanami、Yutaka Ohmori、Akira Matsumoto、Yoshihiko Ito
DOI:10.1002/chem.200401031
日期:2005.1
Highly enantioenriched (E)-allylsilanes have been synthesized from optically active allylicalcohols on the basis of Pd-catalyzed intramolecularbis-silylation followed by highly stereospecific Si-O elimination reactions. The method involves three steps: 1) O-disilanylation of the allylicalcohols with chlorodisilanes, 2) intramolecularbis-silylation in the presence of a 1,1,3,3-tetramethylbutyl