Structural Similarity and Its Surprises: Endothelin Receptor Antagonists - Process Research and Development Report
作者:R. Jansen、M. Knopp、W. Amberg、H. Bernard、S. Koser、S. Müller、I. Münster、T. Pfeiffer、H. Riechers
DOI:10.1021/op000040n
日期:2001.1.1
plant processes are described for three endothelin (ET) receptor antagonists. The efficient synthesis of the parent compound Darusentan proceeds via a Darzens reaction from chloroacetate with benzophenone, addition of methanol to the resulting epoxide, saponification of the alkyl propionate and optical resolution of the racemic acid by crystallisation with a chiral amine. The final stage of the synthetic
描述了三种内皮素 (ET) 受体拮抗剂的工艺研究和试验工厂工艺。母体化合物 Darusentan 的有效合成通过氯乙酸酯与二苯甲酮的 Darzens 反应,将甲醇添加到所得环氧化物中,丙酸烷基酯的皂化和外消旋酸的光学拆分通过手性胺结晶进行。合成序列的最后阶段包括引入嘧啶部分。在此过程中形成的中间体可用作合成另外两种 ET 受体拮抗剂 BSF 420627 和 BSF 302146 的起始材料。用苯乙氧基取代基取代甲氧基的醚交换反应能够制备 BSF 420627。