Pummerer cyclization of β-aminoethyl sulfoxide 6 was effectively achieved using TFAA-TFA in toluene at 80 °C. The cyclized product 7 was then converted to the alkaloid deethylibophyllidine. The required pyrrolo[3,2-c]carbazole 6 was prepared in five steps from 4-methoxyphenethylamine.
使用
TFAA-TFA在80°C的
甲苯中可有效实现β-
氨基乙基亚砜6的Pummerer环化。然后将环化的产物7转化为
生物碱脱乙基
核糖胞苷。由4-
甲氧基苯乙胺分五个步骤制备所需的
吡咯并[3,2- c ]
咔唑6。