Stereoselective synthesis of 2-alkynyl and 2-alkenyl-1-ethoxy glucosides — new types of acetal-glycosides for use in the treatment of cancer
作者:Lutz F. Tietze、Anja Fischer-Beller
DOI:10.1016/0008-6215(94)84250-7
日期:1994.2
-glucopyranose 5a afforded, after in situ anomerisation to 5b with 4 , the corresponding acetal-α-glucoside 10 . Hydrogenation and subsequent deprotection yielded the highly acid-sensitive 2-alkenyl-1-ethoxy glucosides which are of interest as selective anticancer agents.
摘要在催化量的三氟甲硅烷基三氟甲磺酸酯存在下,炔丙醛二乙基乙缩醛1、2、3、4和2,3,4,6-四-O-乙酰基-1-O-三甲基甲硅烷基-β-d-吡喃葡萄糖5a的反应在−78°C的温度下,乙酰化的缩醛-β-葡萄糖苷6-9的产率为60-90%,并保持C-1的构型。同样地,在用4原位异构化成5b后,得到2,3,4,6-四-O-乙酰基-1-O-三甲基甲硅烷基-β-d-吡喃葡萄糖5a,相应的缩醛-α-葡萄糖苷10。氢化和随后的脱保护得到高度酸敏感的2-烯基-1-乙氧基葡糖苷,其作为选择性抗癌剂是令人感兴趣的。