Heterocyclization of functionalized heterocumulenes with C,N- and C,O-binucleophiles: IV. Reactions of 1-chloroalkylheterocumulenes and N-(1-chloroalkylidene)carbamates with 2-benzimidazolylacetonitriles and methyl 2-benzimidazolylacetates
作者:M. V. Vovk、P. S. Lebed?、V. V. Pirozhenko、I. F. Tsymbal
DOI:10.1007/s11178-005-0077-2
日期:2004.11
1-Chloroalkyl isocyanates and 1-chloroalkylcarbodiimides undergo regioselective cyclization with nitriles and esters of 2-benzimidazolylacetic acid to give derivatives of 1-oxo and 1-arylimino-1,2,3,5-tetrahydrobenzo[4,5]imidazo[1,2-c]pyrimidine respectively. The cyclocondensation of 1,1-dichloroalkyl isocyanates or N-(1-chloroalkylidene)carbamates with nitriles and esters of 2-benzimidazolylacetic acid afforded 1,5-dihydrobenzo[4,5]imidazo[1,2-c]pyrimidin-1-one derivatives.
and 1,2-dimethyl-1 H-imidazol-5-amine with aryl isocyanates, α-chloroalkyl isocyanates, N-(alkoxycarbonyl)imidoyl chlorides and 2,4,6-tris(trifluoromethyl)-1,3,5-triazine leads to thiapurines and purines containing trifluoromethyl groups in the 2- and 6-positions of the pyrimidine ring.
Heterocyclization of functionalized heterocumulenes with C,N- and C,O-binucleophiles: V. Synthesis of imidazo[1,5-a]imidazole derivatives by cyclocondensation of 1-chloroalkyl isocyanates with imidazoles and benzimidazole
作者:M. V. Vovk、V. A. Sukach、A. M. Pinchuk、A. N. Chernega、V. V. Pirozhenko、J. A. K. Howard
DOI:10.1007/s11178-005-0071-8
日期:2004.11
1-Chloroalkyl isocyanates react with imidazole, 4(5)-phenylimidazole, and 4,5-dimethyl(phenyl)-imidazoles to give 5-aryl-5-trifluoromethyl-5,6-dihydro-7H-imidazo[1,5-a]imidazole-7-ones, and with benzimidazole affording 1-aryl-1-trifluoromethyl-1,2-dihydro-3H-imidazo-[1,5-a]benzimidazole-3-ones.
1-Chloroalkyl isocyanates react with imidazole, 4(5)-phenylimidazole, and 4,5-dimethyl(phenyl)-imidazoles to give 5-aryl-5-trifluoromethyl-5、6-二氢-7H-咪唑并[1,5-a]咪唑-7-酮,与苯并咪唑反应生成 1-芳基-1-三氟甲基-1,2-二氢-3H-咪唑并[1,5-a]苯并咪唑-3-酮。
Synthesis of 4-Dialkylamino-6-Trifluoromethyl-5,6-dihydro-2-pyridinones via Cyclization of Enamines with α-Chloro-β,β,β-trifluoroethylisocyanates
作者:Aleksandr N. Kostyuk、Dmitriy M. Volochnyuk、Andrei V. Bol’but、Dmitriy A. Sibgatulin、Andrei S. Kuklya、Mikhail V. Vovk
DOI:10.1055/s-2004-831165
日期:——
The interaction of α-chloro-β,β,β-trifluoroethylisocyanates with ‘push-pull’ enamines having a methyl group at the α-position was investigated. As a result, a set of 4-dialkylamino-6-trifluoromethyl-5,6-dihydro-2-pyridinones was obtained. Structural sensitivity of the reaction was found and discussed.
Synthesis of 2,6-dithia-4-azabenzocyclononan-5-ones and their myotropic activity
作者:A. V. Vovk、L. M. Zaitsev
DOI:10.1007/bf00780574
日期:1993.12
activity of a series of new original representations of nine-membered heterocycles -2,6-dithia-4-azabenzocyclononan-5-ones, which do not belong to the known classes of myotropic agents [5]. For the synthesis of 2,6Mithia-4-azabenzocyclononan-5-ones (I-IV) we proposed a method of regioselective heterocyclization of the bifunctional nucleophile -1,2-dimethyl-4,5-di(mercaptomethyl)benzene (V) by chloro-functionalized