The magnesium ion-induced nitrile oxide cycloaddition to chiral α-silylallyl alcohols was examined. Treatment of chiral allyl alcohol with nitrile oxide in the presence of magnesium cation resulted in the smooth progress of the 1,3-dipolar cycloaddition to give optically active 4,5-dihydroisoxazoles in good yields. The present procedure serves as a good method for the preparation of multi-substituted
作者:Ilhwan An、Edith N. Onyeozili、Robert E. Maleczka
DOI:10.1016/j.tetasy.2010.02.030
日期:2010.3
The enzymatic kinetic resolution of alpha-hydroxysilanes where the silicon bears a variety of substituents has been explored. Reactions were performed on various alpha-hydroxysilanes with several commercially available enzymes, solvents, acetylation reagents, and temperatures. The resulting optically active alpha-hydroxysilanes and their corresponding acetates were obtained in varying yields and ees. (C) 2010 Elsevier Ltd. All rights reserved.
Allylic transpositions of homochiral C-1-acyloxy E-crotyl silanes: stereospecific synthesis of E-vinylsilanes
作者:James S. Panek、Michelle A. Sparks
DOI:10.1021/jo00308a011
日期:1990.10
Synthesis, resolution and absolute stereochemical assignment of C1-oxygenated allylsilanes and C3-oxygenated vinylsilanes
作者:James S. Panek、Michelle A. Sparks
DOI:10.1016/s0957-4166(00)80446-2
日期:1990.1
Syntheses of optically active 2-substituted cyclopropanecar☐ylic acids from chiral α-hydroxysilane derivatives
Opticallyactive 2-alkylcyclopropanecar☐ylic acids were efficiently synthesized from the chiral α-hydroxytrimethylsilanes via a diastereoselective cyclopropanation as the key step.