Efficient asymmetric synthesis of the functionalized pyroglutamate core unit common to oxazolomycin and neooxazolomycin using Michael reaction of nucleophilic glycine Schiff base with α,β-disubstituted acrylate
摘要:
The functionalized pyroglutamate core unit, (2R,4R)-3, which could be converted into the beta-lactone/pyrrolidine or gamma-lactone/pyrrolidine ring system of oxazolomycin A 1 and neooxazolomycin 2, and which possesses an exomethylene group at C3 as a scaffold for the Construction of their C3 polyene segment, was synthesized by the Michael reaction of a glycine Schiff base 4 with the alpha,beta-disubstituted acrylate 8 as the key step. (C) 2008 Elsevier Ltd. All rights reserved.
Efficient asymmetric synthesis of the functionalized pyroglutamate core unit common to oxazolomycin and neooxazolomycin using Michael reaction of nucleophilic glycine Schiff base with α,β-disubstituted acrylate
作者:Takeshi Yamada、Kazuhiko Sakaguchi、Tetsuro Shinada、Yasufumi Ohfune、Vadim A. Soloshonok
DOI:10.1016/j.tetasy.2008.11.036
日期:2008.12
The functionalized pyroglutamate core unit, (2R,4R)-3, which could be converted into the beta-lactone/pyrrolidine or gamma-lactone/pyrrolidine ring system of oxazolomycin A 1 and neooxazolomycin 2, and which possesses an exomethylene group at C3 as a scaffold for the Construction of their C3 polyene segment, was synthesized by the Michael reaction of a glycine Schiff base 4 with the alpha,beta-disubstituted acrylate 8 as the key step. (C) 2008 Elsevier Ltd. All rights reserved.