ES243905A1 - Procedure for obtaining benzo-1,3-tiazindionas- (2,4) (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Procedure for obtaining new benzo-1,3-thiazindiones- (2,4) of the general formula **(See formula)** where R1 can be hydrogen, hydroxyl, alkyl, unsaturated alkyl, substituted alkyl, aralkyl, aryl, substituted aryl, a heterocyclic moiety, an amino group or a substituted amino group, and where R2, R3, R4, R5 can be atoms of hydrogen or any substituents, such as halogen, alkyl, aryl, aralkyl, alkoxy, nitro, dialkylamino groups, etc., characterized by being transformed into a mixed acid anhydride aromatic o-mercaptocarboxylic acids in an anhydrous inert solvent in the presence of an amine tertiary, which may optionally also serve as a solvent, and simultaneously replace the hydrogen atom of the mercapto group with a carbalkoxy, carbaralkoxy or carbaryloxy group, if such acids have not been split with a correspondingly substituted mercapto group, and then transform with a H2NR1 compound, or by reacting amides of aromatic o-mercapto acids in an anhydrous inert solvent in the presence of a tertiary amine, which eve It can also serve as a solvent, with phosgene, an alkyl, aralkyl or aryl chlorinated formic acid ester or a dialkyl, diaralkyl or diaryl carbonic acid ester, or by first transforming, in a manner known per se, into acid, acid or halides. -mercaptocarboxylics, whose mercapto hydrogen is substituted in a manner known per se by a carbalkoxy, carbaralkoxy or carbaryloxy group, and these are subsequently transformed into an inert solvent, in the presence of a tertiary amine, which may optionally also serve as a solvent, with a compound H2NR1. (Machine-translation by Google Translate, not legally binding)