作者:Shuai Ma、Zhenren Liu、Jing Pan、Shunli Zhang、Weicheng Zhou
DOI:10.3762/bjoc.13.105
日期:——
A concise and practical stereoselective synthesis of ipragliflozin L-proline was presented starting from 2-[(5-iodo-2-fluorophenyl)methyl]-1-benzothiophene and 2,3,4,6-tetra-O-pivaloyl-α-D-glucopyranosyl bromide without catalyst via iodine-lithium-zinc exchange. The overall yield was 52% in three steps and the product purity was excellent. Two key diastereomers were prepared with efficient and direct
从2-[(5-碘-2-氟苯基)甲基] -1-苯并噻吩和2,3,4,6-四-O-新戊酰基-α-开始,提出了一种简洁实用的伊普拉列净L-脯氨酸立体选择性合成方法。通过碘-锂-锌交换而无需催化剂的D-吡喃葡萄糖基溴化物。三个步骤的总产率为52%,产品纯度极佳。制备了两个关键的非对映异构体,可直接有效地获得α-C-芳基葡萄糖苷。