Synthesis of pyrroloazepines. Facile synthesis of 2-substituted pyrrole derivatives by the phosgene method
作者:Hidetsura Cho、Shinsuke Matsuki、Akira Mizuno、Hirokazu Annoura、Toshio Tatsuoka
DOI:10.1002/jhet.5570340115
日期:1997.1
A highly convenient method for the synthesis of 2-substituted pyrrole derivatives 7a-c from pyrrole using phosgene was developed. Successively, 7-methyl-6,7-dihydro-1H,5H-pyrrolo[2,3-c]azepine-4,8-dione 1a and 6,7-dihydro-1H,5H-pyrrolo[2,3-c]azepine-4,8-dione 1b (aldisin) were synthesized by phosphorus pentoxide/methanesulfonate and polyphosphoric acid cyclization.
开发了一种使用光气从吡咯合成2-取代的吡咯衍生物7a-c的非常方便的方法。依次为7-甲基-6,7-二氢-1 H,5 H-吡咯并[2,3 - c ]氮杂-4,8-二酮1a和6,7-二氢-1 H,5 H-吡咯并[2 ,3- ç ]氮杂卓-4,8-二酮1B(aldisin)通过五氧化二磷/甲磺酸和多磷酸环化合成。