摘要:
A series of N-((1,2,4-triazol-3-yl)-enamine and N-((1,2,3-triazol-4-yl)-enamine were prepared and reacted with a alpha,beta-unsaturated nitriles to yield novel N-(4H-1,2,4-triazol-3-yl)hexahydroquinoline-3-carbonitriles and their fused and Spiro derivatives. Dimroth type rearrangement of the prepared quinoline derivatives 7a,b and 15a,b was observed in acetic anhydride leading to the formation of substituted pyrimido[4,5-b]quinolines 11a,b, spiro[indoline-3,5'-pyrimido [4,5-b]quinoline] 19 and spiro [indoline-3,5'-[1,3]-oxazino[4,5-b]quinoline] 22.