Carbohydrates as chiral auxiliaries: synthesis of 2-hydroxy-β-D-glucopyranosides
摘要:
A new 2-step, 1-pot procedure for the stereoselective glycosylation of allylic alcohols with 1,2-di-O-benzoyl-beta-D-glucopyranosides to produce 2-hydroxy-beta-D-glucopyranosides has been developed. The required precursor for the glycosylation was readily obtained from tri-O-benzyl-D-glucal in 2 steps (91% overall).
Indium(III) Iodide-Catalyzed Stereoselective Synthesis of β-Glucopyranosides by Using a Glucosyl Fluoride Donor with 2-O-Benzoyl-3,4,6-Tri-O-Benzyl Protection
作者:Lan Yu、Weihua Xue、Teng Ma、Changwei Li、Zhan-xin Zhang、Zhaoyan Wang
DOI:10.1055/s-0036-1589121
日期:2017.12
a novel protocol for glucosylation by adopting a glucosyl fluoride donor with 2-O-benzoyl-3,4,6-tri-O-benzyl protection. The protocol is useful for the ready assembly of β-linked functional glycoconjugates, and the reaction accommodates a broad range of substrates. Conveniently, water-tolerant and commercially available InI3 is used as a catalyst, and no other additional reagent is required. The method