Synthesis of Fused Heterocyclic Compounds Derived from 2-Phenyl[1,5]benzothiazepin-4(5H)-One

Abstract

2-PHENYL[1,5]benzothiazepin-4(5H)-one (1) was reacted with arylidenenitriles, a mixture of carbon disulphide or phenyliso-thiocyanate and active nitriles to give pyrano-, pyrido-, thiopyrano-, 1,2-dithiolo[3,4-e]-; 1,3-dithiolo[4,5-e] [1,5] benzothiazepines, benzothi-azepino-[6,5-c] [1,8] naphthyridine and oxathieno [1, 5] benzothiazepines (2 11), respectively. Treatment of compound 1 with a mixture of sulphur and phenyl isothiocyanate or 2-amino-1,1,3- tricyano-2-aminopropene gave 1,3-dithieno [4,5-e]- and thieno [3,2-e]- [1,5] benzothiazepines (12, 13), respectively.

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