A convenient one-pot synthesis of 2-(trifluoromethyl)-3,4,7,8-tetrahydro-2H-chromen-5(6H)-one derivatives and their further transformations
作者:Shaodi Song、Liping Song、Baifan Dai、Hai Yi、Guifang Jin、Shizheng Zhu、Min Shao
DOI:10.1016/j.tet.2008.04.020
日期:2008.6
The trifluoromethyl containing heterocycles, 2-hydroxy-4-aryl-3-(thien-2-oyl)-2-(trifluoromethyl)-3,4,7,8-tetrahydro-2H-chromen-5(6H)-one derivatives 4, were synthesized via a one-pot three-component reaction of aldehyde 1 with 1,3-cyclohexanedione 2 and 4,4,4-trifluoro-1-(thien-2-yl)butane-1,3-dione 3 in the presence of a catalytic amount of Et3N. The effect of bases and solvents on the reaction efficiency
含三氟甲基的杂环化合物2-羟基-4-芳基-3-(噻吩-2-酰基)-2-(三氟甲基)-3,4,7,8-四氢-2 H-铬5(6 H)-通过醛1与1,3-环己二酮2和4,4,4-三氟-1-(噻吩-2-基)丁烷-1,3-二酮的一锅三组分反应合成了一种衍生物4 3在Et催化量的存在3 N.对反应效率和收率的碱和溶剂的影响进行了简单的影响。在乙醇中用过量的NH 4 OAc处理4,得到2-三氟甲基-1 H-喹啉-5-酮衍生物5。用TsOH在CHCl 3中回流4,得到相应的脱水产物8。