Preparation of (Z)-α-chloro-α,β-unsaturated ketones with total or high diastereoselectivity
摘要:
(Z)-alpha-Chloroenones are obtained by reaction of alpha-chloro-beta-hydroxyketones with acetic anhydride, pyridine and 4-dimethylaminopyridine with total or high diastereoselectivity and in high yield. (C) 2002 Elsevier Science Ltd. All rights reserved.
Preparation of (Z)-α-chloro-α,β-unsaturated ketones with total or high diastereoselectivity
作者:José M Concellón、Mónica Huerta
DOI:10.1016/s0040-4020(02)00935-3
日期:2002.9
(Z)-alpha-Chloroenones are obtained by reaction of alpha-chloro-beta-hydroxyketones with acetic anhydride, pyridine and 4-dimethylaminopyridine with total or high diastereoselectivity and in high yield. (C) 2002 Elsevier Science Ltd. All rights reserved.
Addition Reaction of Vinylic Reagents, Derived fromα-Chloroenones, to Carbonyl Compounds Promoted by Samarium Diiodide
作者:José M. Concellón、Pablo L. Bernad、Mónica Huerta、Santiago García-Granda、M. Rosario Díaz
DOI:10.1002/chem.200304954
日期:2003.11.7
A new samarium diiodide-promoted addition reaction of vinylsamarium reagents, derived from (Z)-alpha-chloro-alpha,beta-unsaturated phenones 1, to both ketones (in THF) and aldehydes (in acetonitrile) led to (Z)-2-(1-hydroxyalkyl)-2,3-unsaturated ketones in good yield. These transformations took place with total or very high inversion of the stereochemistry of the C-C double bond of the starting chloroenone