SYNTHESIS OF 2,3-UNSATURATED O-GLYCOSIDES FROM OPTICALLY ACTIVE ALCOHOLS VIA FERRIER REARRANGEMENT: CONFIGURATIONAL STUDIES
作者:JOÃO RUFINO FREITAS FILHO、JUCLEITON JOSÉ RUFINO DE FREITAS、LOUIS COTTIER、DENIS SINOU、RAJENDRA MOHAN SRIVASTAVA
DOI:10.4067/s0717-97072015000400004
日期:——
4-[3-(aryl)-1,2,4-oxadiazol-5-yl] butanones 4a-e have been reduced to optically active 4-[3-(aryl)-1,2,4-oxadiazol-5-yl] butanols 5a-e with baker's yeast. We subjected the alcohols possessing (S)-configuration to Ferrier' rearrangement with tri-O-acetyl-D-glucal 6 which furnished new unsaturated O-glycosides 7a-e. The crystallographic data of the glycosides 7b confirmed the (S)-configuration for the
4- [3-(芳基)-1,2,4-恶二唑-5-基]丁酮4a-e已还原为旋光的4- [3-(芳基)-1,2,4-恶二唑-5- [yl]丁醇5a-e与面包酵母。我们对具有(S)-构型的醇进行了Ferrier的三-O-乙酰基-D-葡萄糖6的重排,后者提供了新的不饱和O-糖苷7a-e。糖苷7b的晶体学数据证实了碳原子的糖苷配基部分的(S)-构型。