Synthesis of the Proposed Structure of Feigrisolide C
摘要:
Possible structures of feigrisolide C were synthesized via ring-closing olefin metathesis reaction of a diester derivative prepared from 8-epinonactic acid, but physical characteristics of the synthetic samples did not match with those of the natural sample of feigrisolide C.
Synthesis of the Proposed Structure of Feigrisolide C
摘要:
Possible structures of feigrisolide C were synthesized via ring-closing olefin metathesis reaction of a diester derivative prepared from 8-epinonactic acid, but physical characteristics of the synthetic samples did not match with those of the natural sample of feigrisolide C.
Total Synthesis of a Conjugation-Ready Tetrasaccharide Repeating Unit of <i>Vibrio cholerae</i> O:3 O-antigen Polysaccharide
作者:Soumyakanta Maji、Balasaheb K. Ghotekar、Suvarn S. Kulkarni
DOI:10.1021/acs.orglett.3c04225
日期:2024.1.26
Herein, we report the first totalsynthesis of the tetrasaccharide repeating unit of Vibrio cholerae O:3 O-antigen polysaccharide. The highly complex tetrasaccharide contains rare amino sugars such as d-bacillosamine and l-fucosamine, highly labile sugar ascarylose, and higher carbon sugar d-d-heptose. Stereoselective glycosylation of the notoriously reactive ascarylose with d-d-heptose, poor nucleophilicity