A process for the production of Esters dialquilicos acid - 2 - 1.3 - ditiol - ylidene malonic

摘要

Process for producing acid Esters dialquilicos ditiol - 1.3 - 2 - ylidene - malonic. A dialquiloxicarbonilcetendimercapturo is to react with a trihalogenoetano, in the presence of a base, The reaction takes place in a mixture of water and a Polar Solvent, such as dimethylsulfoxide.The dialquiloxicarbonilcetandimercapturo is generated in situ by the reaction of dialkyl malonate with carbon disulfide in the presence of a base. The reaction temperature is lower than 30 C and after initially and between 50 and 80 C.