The reduction of benzylidene derivatives of pentose diethyl dithioacetals with lithium aluminium hydride-aluminium trichloride
作者:S.Prahlada Rao、T.Bruce Grindley
DOI:10.1016/0008-6215(91)84088-v
日期:1991.9
O -benzylidene derivatives of pentose diethyl dithioacetals were reduced to di- O -benzyl pentose diethyl dithioacetals in high yield. In three of the five cases studied, single products were obtained: 2,3:4,5-di- O -benzylidene- d -arabinose diethyl dithioacetal gave the 2,5-di- O -benzyl derivative; 2,4:3,5-di- O -benzylidene- d -xylose diethyl dithioacetal, the 2,3-di- O -benzyl derivative; and
摘要将戊糖二乙基二硫缩醛的二-O-亚苄基衍生物高产率地还原为二-O-苄基戊糖二乙基二硫缩醛。在所研究的五种情况中的三种中,获得了单一产物:2,3:4,5-二-O-亚苄基-d-阿拉伯糖二乙基二硫缩醛得到了2,5-二-O-苄基衍生物。2,3-二-O-苄基衍生物2,4:3,5-二-O-亚苄基-d-木糖二乙基二硫缩醛;和4,5-二-O-苄基衍生物2,4:3,5-二-O-亚苄基-d-山梨糖二乙基二硫缩醛。其他人给了混合物。建议获得的产物的性质是由空间效应和对仲氧-乙缩醛碳键的初始裂解的偏好决定的。