Synthesis of Highly Functionalized Furanones via Aldol Reaction of 3-Silyloxyfurans
摘要:
The stereoselective aldol reaction of 3-silyloxyfurans with aldehydes in the presence of a Lewis acid is described. N-Bromosuccinimide (NBS)-mediated cyclization of the aldol product leads to the formation of the 2,7-dioxa-bicyclo[2.2.1]heptan-3-one ring system, which represents the formal product of hetero Diels-Alder reaction of the furan with the aldehyde.
Synthesis of Highly Functionalized Furanones via Aldol Reaction of 3-Silyloxyfurans
摘要:
The stereoselective aldol reaction of 3-silyloxyfurans with aldehydes in the presence of a Lewis acid is described. N-Bromosuccinimide (NBS)-mediated cyclization of the aldol product leads to the formation of the 2,7-dioxa-bicyclo[2.2.1]heptan-3-one ring system, which represents the formal product of hetero Diels-Alder reaction of the furan with the aldehyde.
A One-Step Synthesis of 2,3-Dihydro-4<i>H</i>-pyran-4-ones from 3-Ethoxy α,β-Unsaturated Lactones
作者:Jeffrey D. Winkler、Kyungsoo Oh
DOI:10.1021/ol050702z
日期:2005.6.1
[GRAPHICS]Addition of diverse nucleophiles to the unsaturated lactone 2 that results from hetero Diels-Alder reaction of Brassard's diene 1 with aldehydes leads to an efficient and general approach to the synthesis of 2,3-dihydro-4H-pyran-4-ones 3.