Reactions of Keten Acetals. Part I. A Simple Synthesis of Some Naturally Occurring Anthraquinones
作者:Jacques Banville、Jean-Louis Grandmaison、Gérard Lang、Paul Brassard
DOI:10.1139/v74-011
日期:1974.1.1
A study of the condensation of keten acetals with some halonaphthoquinones has led to the simple and regiospecific synthesis of some naturally occurring anthraquinones: catenarin, helminthosporin, emodin, and chrysophanol. The results show unambiguously that a previously proposed mechanism is erroneous. The reaction of these acetals with chloromaleic anhydride also provided a one-step preparation of
对烯酮缩醛与一些卤代萘醌缩合的研究导致了一些天然蒽醌的简单和区域特异性合成:连环素、蠕孢菌素、大黄素和大黄酚。结果明确表明,先前提出的机制是错误的。这些缩醛与氯代马来酸酐的反应也提供了一些取代邻苯二甲酸酐的一步制备。