Wang Yan-ru, Yuan Haifeng
2007
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Journal
Journal of Lanzhou University
Abstract
Z(E)-ethyl 3-oxo-2-(4-phenyl-1,3-dithiolan-2-ylidene)butanoate (1) was prepared in moderate (40.3%) yield by the reaction of ethyl 3-oxobutanoate with carbon disulfide and 1-(1,2-dibromoethyl)benzene with potassium carbonate as the base in DMF.Subsequently,the condensation reaction of 1 with arylalde- hydes was performed in the presence of C_2H_5ONa in C_2H_5OH,in which the product of condensation and ester hydrolysis:(2Z(E),4E)-3-oxo-5-phenyl-2-(4-phenyl-1,3-dithiolan-2-ylidene)pent-4-enoic acid (2) were isolated in good yield.