Process for the manufacture of iso-imides or mixtures of...

Details Process for the manufacture of iso-imides or mixtures of... Process for the manufacture of iso-imides or mixtures of...

C - Chemistry, Metallurgy

07

D

260/306, 260/316

C07D 207/44 (2006.01) C07D 207/452 (2006.01) C07D 307/34 (2006.01) C07D 307/56 (2006.01) C07D 307/90 (2006.01)

Patent

CA 1084937

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

271440

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