Lanthanide(III) Promoted Aldol Condensation of Enones and Aldehydes<sup>1</sup>
作者:Bor-Cherng Hong、Sheng-Fei Chin
DOI:10.1080/00397919708003356
日期:1997.4
Abstract The first lanthanide (III) mediated α′-alkylation of MVK with aldehydes is described. This methodology allows the efficient preparation of a number of synthetically important hydroxyenones.
The Chemistry of Trichlorosilyl Enolates. Aldol Addition Reactions of Methyl Ketones
作者:Scott E. Denmark、Robert A. Stavenger
DOI:10.1021/ja001023g
日期:2000.9.1
observed in this uncatalyzed aldol process. The aldol additions are dramatically accelerated by the addition of catalytic quantities of chiral phosphoramides, particularly one derived from N,N‘-dimethylstilbene-1,2-diamine. In this catalyzed mode, good to high enantioselectivities are obtained with a variety of achiral trichlorosilyl enolates and aldehydes. When either partner bears a stereogenic center
Rhodium Carbenoid Initiated O–H Insertion/Aldol/Oxy-Cope Cascade for the Stereoselective Synthesis of Functionalized Oxacycles
作者:Kiran Chinthapally、Nicholas P. Massaro、Indrajeet Sharma
DOI:10.1021/acs.orglett.6b03229
日期:2016.12.16
A novel diazo-cascade approach has been developed for the synthesis of nine-membered oxacycles utilizing readily accessible β-hydroxy vinyl ketones and vinyl diazo esters. The Rh(II)-catalyzed cascade reaction begins with carbene O–H insertion followed by an intramolecular aldol cyclization to provide a substituted tetrahydrofuran intermediate that undergoes an oxy-Cope rearrangement to provide functionalized