A new enantioselective approach to the trans-4,5-benzhydrindane skeleton by intramolecular cycloaddition of o-quinodimethane, generated by thermolysis of a benzocyclobutene derivative, is described. Using this method, the synthesis of the A-nor B-aromatic aglycon of OSW-1, a potent antitumor saponin, was accomplished. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
描述了一种新的对映选择性方法,通过对
苯并环丁烯衍
生物的热解产生的邻醌二
甲烷的分子内环加成作用对反式-4,5-二苯甲基
茚满骨架。使用这种方法,合成了一种有效的抗肿瘤
皂苷 OSW-1 的 A-nor B-芳香苷元。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)