A novel 13 O→C silyl rearrangement in carbohydrate chemistry: Synthesis of α-D-glycopyranosyltrimethylsilanes
作者:Valérie Pedretti、Alain Veyrières、Pierre Sinaÿ
DOI:10.1016/s0040-4020(01)97585-4
日期:1990.1
Reductive lithiation of 2-O-trimethylsilyl derivatives of phenyl thiogluco and -galactopyranosides gives rise to a 13 O→C silyl migration leading to α-D-gluco and -galctopyranosyltrimethylsilanes in good yields. The expected β-elimination is observed to a small extent in the case of a 23-di-O-trimethylsilyl derivative of phenyl thioglucopyranoside where a tandem 13 O→C 14 O→O silyl rearrangement occurs
苯基硫代葡萄糖和-半乳糖吡喃糖苷的2- O-三甲基甲硅烷基衍生物的还原锂化反应导致13 O→C甲硅烷基迁移,从而以高收率得到α-D-葡萄糖和-半乳糖吡喃糖基三甲基硅烷。在苯硫基葡糖吡喃糖苷的23-二-O-三甲基甲硅烷基衍生物发生串联13 O→C 14 O→O甲硅烷基重排的情况下,在很小的程度上观察到了预期的β-消除,但该反应是唯一的可能的反应。苯硫基甘露聚糖吡喃糖苷的O-甲硅烷基化衍生物的情况。