Reaction of Active Methylene Compounds with α-Fluoroalkyl Ketones or Esters: A Convenient Synthesis of 4-Trifluoromethylpyridines and meta-Trifluoromethylphenols
作者:Hui-Ping Guan、Chang-Ming Hu
DOI:10.1055/s-1996-4393
日期:1996.11
The reaction of α-fluoroalkyl ketones 1 or ethyl α-fluoroalkylacetates 2 with active methylene compounds such as methyl acetoacetate (3), acetylacetone (4) and diethyl malonate (5) produced unsaturated fluoroalkyl-containing 1,5-dicarbonyl compounds 6, from which polyalkyl-substituted 4-trifluoromethylpyridines 7, 4-trifluoromethylpryrid-2(1H)-ones 8 and meta-trifluoromethylphenols 9 were synthesized conveniently.
δ-氟烷基酮 1 或δ-氟烷基乙酸乙酯 2 与乙酰乙酸甲酯 (3)、乙酰丙酮 (4) 和丙二酸二乙酯 (5) 等活性亚甲基化合物反应,生成含不饱和氟烷基的 1、5-二羰基化合物 6,从中可方便地合成多烷基取代的 4-三氟甲基吡啶 7、4-三氟甲基吡啶-2(1H)-酮 8 和偏三氟甲基苯酚 9。