Iminophosphorane-mediated synthesis of 1-acyl-β-carbolines: A new access to the alkaloids eudistomin T, S and xestomanzamine A of marine origin
作者:Pedro Molina、Pilar M Fresneda、Sagrario García-Zafra
DOI:10.1016/s0040-4039(97)82962-0
日期:1996.12
described. The key step, formation of the 1-phenylacetyl β- carboline, involves a tandem aza Wittig / electrocyclic ring closure process. The first synthesis of the alkaloid xestomanzamine A is achieved by coupling of a N-protected harmane, now available via aza Wittig / electrocyclic ring closure process, with a 5-lithioimidazole derivative.
描述了生物碱eudistomin T和S的新合成方法。关键步骤是形成1-苯基乙酰基β-咔啉,这涉及串联氮杂Wittig /电环闭合过程。生物碱异丁苯甲胺A的首次合成是通过将N-保护的harmane与5-lithioimidazole衍生物偶合(现在可通过aza Wittig /电环闭合工艺获得)。