A new and efficient synthesis of 2-trifluoromethyl substituted pyrroles and ethyl-2,3-bis(ethoxycarbonyl)-1H-pyrrole-1-propionate
作者:Michael G. Hoffmann、Ernest Wenkert
DOI:10.1016/s0040-4020(01)86286-4
日期:1993.1
dihydrofuroates 7a and 7b, respectively, which can be converted into the corresponding 2-(trifluoromethyl)pyrroles. This two step pyrrole synthesis is also suitable for the preparation of ethyl 2,3-bis(ethoxycarbonyl)-1H-pyrrole-1-propinate, an important intermediate for the synthesis of necin bases.
三氟甲基乙酰基重氮乙酸酯6a和6b在乙基乙烯基醚中的四乙酸二丁酯催化分解分别产生二氢糠酸酯7a和7b,可以将其转化为相应的2-(三氟甲基)吡咯。这两个步骤的吡咯合成也适用于制备2,3-双(乙氧基羰基)-1H-吡咯-1-丙酸乙酯,这是合成necin碱的重要中间体。