Synthesis of novel 2-perfluoroacylcyclohexane-1,3-diones
摘要:
A one-pot synthesis of 2-perfluoroalkanoylcyclohexane-1,3-diones via C-acylation of cyclohexane-1,3-diones with N-perfluoroacylimidazole as an acylating agent is reported. A reaction was examined with isolated N-trifluoroacetylimidazole and with N-perfluoroacylimidazoles generated in situ from perfluorocarboxylic acid anhydrides or perfluorocarboxylic acids. (c) 2006 Elsevier B.V. All rights reserved.
Orthogonal Regioselective Synthesis of N-Alkyl-3-substituted Tetrahydroindazolones
作者:Jonghoon Kim、Heebum Song、Seung Bum Park
DOI:10.1002/ejoc.201000516
日期:——
A divergent strategy for the regioselective and orthogonalsynthesis of complementary regioisomers of N-alkyl-3-substituted-tetrahydroindazolones 3 and 4 was achieved from Boc-protected alkylhydrazines 1. The robustness and substrate generality of this method were validated by synthesizing 3 and 4 through the intra- and intermolecular condensation of 1 with various 2-acylcyclohexane-1,3-diones 2 and
One-Pot Synthesis of Trifluoromethyl-Substituted Imidazobenz[1,2-d]- and -[1,2-c]isoxazoles
作者:T. S. Khlebnikova、Yu. A. Piven’、V. G. Isakova、V. A. Smaliak、A. V. Baranovsky、F. A. Lakhvich
DOI:10.1134/s1070363220040295
日期:2020.4
5-dihydro-3H-imidazo[4',5':5,6]benz[1,2-d]isoxazoles and 8-trifluoromethyl-4,5-dihydro-3H-imidazo[4',5':3,4]benz[1,2-c]isoxazolones was realized by one-pot oxidation of 3-trifluromethyl-6,7-dihydrobenz[d]- or [c]isoxazoles with seleniumdioxide in glacial aceticacid followed by a condensation of formed in situ 3-trifluromethyl-6,7-dihydrobenz[d]- or [c]isoxazole-4,5-diones with benzaldehydes in the presence of
摘要区域异构的8-三氟甲基-4,5-二氢-3 H-咪唑并[4',5':5,6]苯并[1,2- d ]异恶唑和8-三氟甲基-4,5-二氢-3 H -咪唑并[4',5':3,4]苯并[1,2 -c ]异恶唑酮是通过用硒一锅氧化3-三氟甲基-6,7-二氢苯并[ d ]-或[ c ]异恶唑来实现的在冰醋酸中加入二氧化氯,然后在乙酸铵存在下,将形成的原位3-三氟甲基-6,7-二氢苯并[ d ]-或[ c ]异恶唑-4,5-二酮与苯甲醛缩合。
Reaction of 2-perfluoroalkanoylcyclohexane-1,3-diones with diazomethane
作者:T. S. Khlebnikova、V. G. Isakova、F. A. Lakhvich
DOI:10.1134/s1070428009040083
日期:2009.4
the corresponding enol ethers and 3-hydroxy-6,6-dimethyl-3-perfluoroalkyl-2,3,6,7-tetrahydrobenzofuran-4(5H)-ones. The latter underwent dehydration on heating in boiling benzene in the presence of a catalytic amount of p-toluenesulfonicacid to give 6,6-dimethyl-3-perfluoroalkyl-6,7-dihydrobenzofuran-4(5H)-ones.
Synthesis of 8,9-dihydro[1,2,4]triazolo[1,5-a]-quinazolin-6(7H)-one derivatives
作者:A. A. Petrov、A. N. Kasatochkin
DOI:10.1134/s1070428013040027
日期:2013.4
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.
α-Amino azoles in the synthesis of heterocycles: VI. Synthesis and structure of cycloalkane-annulated pyrazolo[1,5-a]pyrimidines
作者:A. A. Petrov、A. N. Kasatochkin、E. E. Emelina、Yu. V. Nelyubina、M. Yu. Antipin
DOI:10.1134/s1070428009090139
日期:2009.9
Reactions of 4-aryl-1H-pyrazol-5(3)-amines with 2-acylcycloakanones and 2-acyl-5,5-dimethylcyclohexane-1,3-diones led to the formation of regioisomeric 6,7,8,9-tetrahydropyrazolo[1,5-a]quinazoline, 5,6,7,8-tetrahydropyrazolo[5,1-b]quinazoline, and 7,8-dihydro-6H-cyclopenta[e]pyrazolo[1,5-a]pyrimidine derivatives. The product structure was determined by X-ray analysis and H-1 and C-13 NMR spectroscopy.