High diastereofacial selectivity in the reaction of silyl enol ethers with chlorosulfides
作者:Javed Iqbal、Alka Shukla
DOI:10.1016/s0040-4020(01)96197-6
日期:1991.10
The chlorosulfides 1 or 2 react with silylenolethers in presence of anhydrous zinc bromide to give mainly the corresponding syn products 4 or 6 respectively. The high syn selectivity of these reaction is explained by nucleophilic addition to a Chelated Chiral thioniun ion.
Natural product synthesis using π-allyltricarbonyliron lactone complexes: Synthesis of parasorbic acid, the carpenter bee pheromone and malyngolide
作者:Averil M. Horton、Steven V. Ley
DOI:10.1016/0022-328x(85)87394-0
日期:1985.4
Preparation of three δ-lactonic natural products, parasorbic acid, the carpenter bee pheromone and malyngolide has been achieved fromπ-allyltricarbonylironlactonecomplexes as the key synthetic intermediates.
Synthesis of 2,6-Dideoxysugars via Ring-Closing Olefinic Metathesis
作者:Peter R. Andreana、Jason S. McLellan、Yongchen Chen、Peng George Wang
DOI:10.1021/ol026710m
日期:2002.10.1
graphicGrubbs' RuCl2(=CHPh)(PCy3)(2) (catalyst 1) and RuCl2(=CHPh)(PCy3)(IMess) (catalyst 2) complexes have been successfully utilized in the construction of beta,gamma-unsaturated delta-lactones containing various substitution patterns of methyl groups. Asymmetric dihydroxylation followed by reduction leads to 3,4-cis-dihydroxy-2,6-dideoxypyranoses, which have proven to play very important biological roles as key components of natural products.