作者:Peter L. Barker、Corazon Bahia
DOI:10.1016/s0040-4020(01)88363-0
日期:1990.1
Specifically, 2-(trichloro)- and (trifluoro)- acetyl-1-methyl pyrroles and ethyl 1-methylpyrrole-2-oxoacetate yield, when treated with paraformaldehyde and hydrogen chloride, and in the absence of any Friedel-Crafts catalyst, the corresponding 4-chloromethyl compounds in high yield and with high regiospecificity. These chloromethylpyrroles are versatile intermediates and offer access to some known
已经观察到在2-位含有某些吸电子基团的吡咯的新型氯甲基化,具有合成实用性。具体而言,当用低聚甲醛和氯化氢处理且在没有任何Friedel-Crafts催化剂的情况下,2-(三氯)-和(三氟)-乙酰基-1-甲基吡咯和1-甲基吡咯-2-氧代乙酸乙酯的收率相应的4-氯甲基化合物,具有高收率和高区域特异性。这些氯甲基吡咯是通用的中间体,可提供一些已知的和一些新的吡咯化合物。