名称:
Five-membered 2,3-dioxo heterocycles: LXII. Reaction of 3-aroyl-1H-pyrrolo[2,1-c][1,4]benzoxazine-1,2,4-triones with N,N′-dihydroxycyclohexane-1,2-diamine. Unusual rearrangement in the spiro[quinoxaline-2,2′-pyrrole] system
摘要:
3-Aroyl-1H-pyrrolo[2,1-c][1,4]benzoxazine-1,2,4-triones reacted with N,N'-dihydroxycyclohexane-1,2-diamine to give 3-aroyl-1',4,4'-trihydroxy-1-(2-hydroxyphenyl)-4a',5',6',7',8',8a'-hexahydro-1H-spiro[pyrrole-2,2'-quinoxaline]-3',5(1H,4'H)-diones which underwent rearrangement into 1'-aroyloxy-4,4'-dihydroxy-1-(2-hydroxyphenyl)-4a',5',6',7',8',8a'-hexahydro-1H-spiro[pyrrolidine-2,2'-quinoxaline]-3',4,5(4'H)-triones via [1,4]-migration of the aroyl group. The product structure was proved by X-ray analysis.