作者:Shozo Fujii、Yasuo Maki、Hiroshi Kimoto、Louis A. Cohen
DOI:10.1016/s0022-1139(00)85096-4
日期:1986.1
title condensation occurred readily at reflux (100°C) with the methyl hemiacetal of trifluoroacetaldehyde and provided 37.3% of 4(5)-(1′-hydroxy-2′,2′,2′-trifluoroethyl)imidazole as the major product, together with 8.8% of 2-(1′-hydroxy-2′,2′,2′-trifluoroethyl)imidazole, 7.2% of 2,4(5)-bis-(1′-hydroxy-2′,2′,2′-trifluoroethyl)imidazole and 0.4% of the 4,5-bis-product. (Trifluoroacetyl)imidazoles were
在三氟乙醛的甲基半缩醛回流(100°C)时容易发生标题缩合,提供37.3%的4(5)-(1'-羟基-2',2',2'-三氟乙基)咪唑为主要产物以及8.8%的2-(1'-羟基-2',2',2'-三氟乙基)咪唑,7.2%的2,4(5)-双-(1'-羟基-2',2' ,2'-三氟乙基)咪唑和0.4%的4,5-双产物。通过这些缩合产物的氧化来制备(三氟乙酰基)咪唑。缩合产物的硝化和溴化分别得到相应的硝基咪唑和溴咪唑。