【摘要】 以碳酸钾为碱,以N,N-二甲基甲酰胺为溶剂,乙酰丙酮与二硫化碳及1,2-二溴苯乙烷反应,以中等产率(47%)合成了3-(4-苯基-1,3-二硫戊环-2-亚甲基)-2,4-戊二酮2.碱性条件下,化合物2比较稳定,通过对碱的选择和芳醛量的控制,化合物2与芳醛缩合可分别以较高的产率合成单面和双面缩合产物1d和1e.更多还原

【Abstract】 3-(4-Phenyl-1,3-dithiolan-2-ylidene)pentane-2,4 dione(2)was prepared in moderate (47%)yield by the reaction of acetylacetone with carbon disulfide and 1-(1,2-dibromoethyl)benzene u- sing potassium carbonate as base.Under the optimized conditions,the condensation of compound 2 with arylaldehydes led to the corresponding productsα-acetyl-α′cinnamoyl ketene dithioacetals 1d andα,α′dicinnamoyl ketene dithioacetals le,respectively,in high to excellent yields.更多还原