NEW HETEROCYCLIC SYSTEM SYNTHESIS IV.4a, 5,6, 12-TETRAHYDRO-1H-1,3-OXAZ1NO 3,2-d1,5-BENZOTHIAZEPINE-1-ONE

摘要

Addition of a-carbonylketenes, generated from 2-diazo-1, 3-diaryl-1, 3-propandione or 2-diazo-1-phenyl-1,3-butandione by heating, to 2,4-diaryl-2,3-dihydro-[1,5]-benzothiazepines gave 2,3-disubstituted-4a, 6-diaryl-4a,5,6,12-telrahydro-1H-1, 3-oxazino[3,2d][1,5]-benzothiazepine-l-ones, a new ring system.