PROCESS FOR THE MANUFACTURE OF ISO-IMIDES OR MIXTURES OF ISO-IMIDES AND IMIDES

摘要

Abstract of the DisclosureA process for the manufacture of iso-imides of theformula (I)and mixtures of iso-imides of formula (I) and imides offormula (Ia)wherein A is -CH=CH- or , n is 1 or 2 and Q repre-sents phenyl, 1- or 2-naphthyl, phenylene or naphthyleneor certain such substituted groups, is described by reactingcorresponding amide-acids with ketene at temperatures ofabout -10°C to +80°C. According to the process of the inven-tion, the iso-imides or mixtures of iso-imides and imidescan be manufactured in a simple, economical manner and ingood to very good yields. The acetic anhydride formedduring the reaction with ketene can easily be recovered.ABSTRACT OF THE DISCLOSURE: Bisdithiocarbamate esters of di-lower alkylformals and related compounds are disclosed. The final products are useful arubber cure accelerators, biocides, antioxidants, corrosion inhibitors, andsulfur bearing oil additives.