Enantioselective Total Synthesis of Diocollettines A
作者:Yuichiro Kawamoto、Toyoharu Kobayashi、Hisanaka Ito
DOI:10.1021/acs.orglett.9b01776
日期:2019.8.2
The first enantioselectivetotalsynthesis of diocollettines A was accomplished in only six steps from a known compound. A short and practical synthetic route was disclosed, featuring an intensive investigation of the stereoselective aldol reaction as a key step using an easily prepared aldehyde moiety and an enone derivative. The synthetic scheme also includes the efficient stereocontrolled construction
An Exceptionally Mild Catalytic Thioester Aldol Reaction Inspired by Polyketide Biosynthesis
作者:Gojko Lalic、Allen D. Aloise、Matthew D. Shair
DOI:10.1021/ja029452x
日期:2003.3.1
This report details our discovery of a new catalytic ester aldol reaction using malonic acid half thioesters (MAHTs) that directly affords beta-hydroxythioesters. The reaction is catalyzed by combination of a Cu(II) salt and an amine base, and it can be performed under exceptionally mild conditions (23 degrees C, open to the air, wet solvent). Methyl malonic acid half thioesters afforded syn aldol products with distereoselectivities greater than 6:1.