Regiospecific Electrocyclization of β-Arylvinyl Ketenimines. Formal Syntheses of the Alkaloid from Marine Origin Aaptamine
作者:Pedro Molina、Angel Vidal、Isidora Barquero
DOI:10.1055/s-1996-4367
日期:1996.10
Preparation of 6,7-dimethoxy-1-methyl-8-nitroisoquinoline and 6,7-dimethoxy-1-methylisoquinoline, used as precursors in the synthesis of the alkaloid aaptamine, is reported. The method is based on the regiospecific electrocyclization of the appropriate β-arylvinyl ketenimine available by aza-Wittig reaction of the corresponding vinyl iminophosphorane with (trimethylsilyl)ethenone.
报道了用于合成生物碱aaptamine的前体物质6,7-二甲氧基-1-甲基-8-硝基异喹啉和6,7-二甲氧基-1-甲基异喹啉的制备方法。该方法基于特定区域的电环化反应,利用适当的β-芳基乙烯基烯胺,该烯胺可通过相应的乙烯亚胺磷烷与(三甲基硅基)乙烯酮的aza-Wittig反应获得。