Preparation of a 1,3-dithiol-2-ylidene malonic-acid dialkyl ester for use as an agricultural or horticultural fungicide and as a therapeutic agent for treating hepatic diseases can be prepared by a new process comprising reacting a dialkyloxycarbonylketene dimercaptide with a 1,1-dihalogenoethylene, according to the formula:
in which
M=alkali metal or ammonium
X = halogen
R and R'=tower alkyl.
制备用作农用或园艺杀真菌剂和治疗肝病的治疗剂的 1,3-二
硫醇-2-亚基
丙二酸二烷基酯,可通过一种新工艺制备,该工艺包括使二烷氧基羰基酮二巯基化合物与 1,1-二卤代
乙烯反应,其反应式如下: 式中 M=碱
金属或
铵 X=卤素 R 和 R'= 塔式烷基。