Synthesis of 8,9-dihydro[1,2,4]triazolo[1,5-a]-quinazolin-6(7H)-one derivatives
摘要:
Regioselectivity of the reactions of 1H-1,2,4-triazol-3-amines with 2-acyl-5,5-dimethylcyclohexane-1,3-diones and 2-dimethylaminomethylidene-5,5-dimethylcyclohexane-1,3-dione was studied. In all cases, the products were substituted 8,9-dihydro[1,2,4]triazolo[1,5-a]quinazolin-6(7H)-ones whose structure was determined by H-1 and C-13 NMR spectroscopy.
An Efficient Synthesis of 1-(4H-1,2,4-Triazol-3-yl)-Hexahydroquinoline-3-carbonitrile and their Spiro Derivatives from β-Enaminones
作者:Ismail A. Abdelhamid、S. A. Soliman Ghozlan、Doaa M. Abdelmoniem、Mohamed F. Mady、Amr M. Abdelmoniem
DOI:10.3987/com-15-13353
日期:——
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.
Synthesis of 9-Aryl-6,6-dimethyl-5,6,7,9-tetrahydro-1,2,4-triazolo[5,1-b]quinazolin-8(4H)ones
作者:V. V. Lipson、S. M. Desenko、M. G. Shirobokova、V. V. Borodina