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Reactions of Isothiocyanates with N-Acyl-O-alkylhydroxylamines andBenzyloxyamine.-The thiocarbamoyl derivatives (III) are obtained by the reaction of different isothiocyanates with N-acyl-O-alkylhydroxylamines or benzyloxyamine. -(SINGHA, A. S.; KAITH, B. S.; CHAUHAN, G. S.; THAKUR, A.; RAO, G. C.; MISRA, B. N.; J. Indian Chem. Soc. 76 (1999) 6, 317-318; Dep. Appl. Sci., Reg. Eng. Coll., Hamirpur 177 005, India; EN)

A number of stable isoimides have been prepared by acylation and sulfonylation of O-benzylbenzohydroxamic acid and O-butylbenzohydroxamic acid by anisoyl chloride, benzoyl chloride, phenoxyacetyl chloride, p-toluenesulfonyl chloride, benzenesulfonyl chloride and p-nitrobenzenesulfonyl chloride in the presence of pyridine. Spectral investigations indicate that the products have the mixed anhydride structure with (Z)-configuration. Corresponding (E)-isomers and isomeric N-acetylated products if formed, could not be isolated. An attempt has been made to study 1,3-rearrangement of the mixed anhydrides by thermal method.

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