SYNTHESIS OF 2,3,5,6,7,8-HEXAHYDRO-3-AMINO-2-THIOXOBENZOTHIENO-PYRIMIDIN-4(1H)-ONE AND DERIVATIVES OF THE NEW HETEROCYCLIC SYSTEM 7,8,9,10-TETRAHYDRO-3H,11H-BENZOTHIENOPYRIMIDOTHIADIAZIN-11-ONE

Article abstract of DOI:10.3987/COM-92-6304

A versatile compound 2,3,5,6,7,8-hexahydro-3-amino-2-thioxo<1>benzothieno<2,3-d>pyrimidin-4(1H)-one (4), was synthesized from ethyl 4,5,6,7-tetrahydro-2-isothiocyanato-1-benzothiophene-3-carboxylate (1).Derivatives of a heterocyclic linear system having the 1,3,4-thiadiazine ring were obtained from the key intermediate (4).