作者:Volodymyr A. Sukach、Anastasia A. Resetnic、Viktor M. Tkachuk、Zhengguo Lin、Ulrich Kortz、Mykhailo V. Vovk、Gerd-Volker Röschenthaler
DOI:10.1002/ejoc.201403495
日期:2015.2
4-(Trifluoromethyl)pyrimidin-2(1H)-ones react with trimethylsilyl cyanide in the presence of a tertiary amine catalyst to give Michael-like 1,4-conjugate hydrocyanation adducts exclusively at the 3,6-positions. The resulting 2-oxo-6-(trifluoromethyl)-1,2,3,4-tetrahydropyrimidine-4-carbonitriles have been used to synthesize new trifluoromethylated 4,5-dihydroorotic acid analogues and their esters in
4-(三氟甲基)嘧啶-2(1H)-酮在叔胺催化剂存在下与三甲基甲硅烷基氰化物反应,生成仅在3,6-位的迈克尔样1,4-共轭氢氰化加合物。所得 2-oxo-6-(trifluoromethyl)-1,2,3,4-tetrahydropyrimidine-4-carbonitriles 已被用于合成新的三氟甲基化 4,5-dihydroorotic acid 类似物及其外消旋和对映体纯形式的酯手性辅助方法。在晶态观察到的CF3基团的氟原子和酯基团的碳原子之间的正交分子内C-F…C=O相互作用可以稳定甲基2-oxo-6-(三氟甲基)六氢嘧啶-4-羧酸盐分子,带有轴向取代基。