Abstract
A series of potentially cytotoxic α,β-unsaturated γ -hydroxy-butyrolactones, -lactams and -thiolactones has been synthesized via regioselective hydride reduction of the appropriate maleic acid anhydrides, imides and thioanhydrides. By this means a straightforward access to naturally occurring antibiotic narthigenine 2, its hitherto unknown thio-analogue 5b and higher substituted derivatives and analogues of 2 is presented.
摘要
已合成一系列潜在细胞毒性的α,β-不饱和γ-羟基丁内酯,内酰胺和硫内酯,通过对应马来酸酐,内酰胺和硫酸酐的选择性氢化还原。通过这种方法,提供了一种直接获取自然存在的抗生素纳尔提吉宁2及其迄今未知的硫代衍生物5b和2的更高取代衍生物和类似物的途径。