Metallation of 2,4-Dialkoxy-5-bromopyrimidine and Formylation with Dimethylformamide: Isolation of 2,6-Dialkoxy-5-dimethylaminopyrimidine-4-carboxaldehyde
作者:Soumita Mukherjee、Binay K. Ghorai
DOI:10.1080/00397910903175397
日期:2010.6.16
Direct metallation of 2,4-dialkoxy-5-bromopyrimidine with lithium diisopropylamide and consequent trapping by dimethylformamide resulted unexpectedly in the formation of 2,6-dialkoxy-5-dimethylaminopyrimidine-4-carboxaldehyde via displacement of bromine by dimethylamine moiety of dimethylformamide.
2,4-二烷氧基-5-溴嘧啶与二异丙基氨基锂直接金属化,随后被二甲基甲酰胺捕获,通过二甲基甲酰胺的二甲胺部分置换溴,出人意料地形成了 2,6-二烷氧基-5-二甲氨基嘧啶-4-甲醛。