Cyclocondensation of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-R-1,2-dihydropyrid-2-ones with heterocyclic N,N-and N,C-1,3-dinucleophiles
摘要:
[3+3] Cyclocondensation of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-R-1,2-dihydropyrid-2-ones with heterocyclic N,N- and N,C-1,3-dinucleophiles proceeds regioselectively to give a series of new tri- and tetracyclic heterosystems, viz. derivatives of 5,6-dihydropyrazolo[1,5-a]pyrido[2,3-d]pyrimidin-6-one, 1,2-dihydropyrido[2,3-d]pyrido[2',3':3,4]pyrazolo[1,5-a]pyrimidin-2-one, 8,9-dihydro-5H-pyrido[2,3-d]thiazolo[3,2-a]pyrimidin-8-one, 1,2-dihydrobenzo[4,5]imidazo[1,2-a]pyrido[2,3-d]pyrimidin-2- one, and 1,2-dihydrobenzo[4,5] imidazo[1,2-g][1,6]naphthyridin-2-one.
Recyclization of ethyl 1-alkyl-5-benzoyl-6-methylsulfanyl-2-oxo-1,2-dihydropyridine-3-carboxylates into Bicyclic N-alkyl-5-benzoyl-2-oxo-1,2-dihydropyridine-3-carboxamide derivatives by the action of nitrogen-containing 1,4- and 1,5-binucleophiles
作者:V. N. Britsun、A. N. Esipenko、A. V. Gutov、A. N. Chernega、M. O. Lozinskii
DOI:10.1134/s1070428009120148
日期:2009.12
Reactions of ethyl 1-alkyl-5-benzoyl-6-methylsulfanyl-2-oxo-1,2-dihydropyridine-3-carboxylates with nitrogen-containing 1,4- and 1,5-binucleophiles (o-phenylenediamine, o-aminobenzenethiol, ethane-1,2-diamine, and propane-1,3-diamine) involved recyclization, leading to the formation of fused N-alkyl-5-benzoyl- 2-oxo-1,2-dihydropyridine-3-carboxamides, diethyl 6,6'-oxybis(1-alkyl-5-benzoyl-2-oxo-1,2-dihydropyridine-3-carboxylates), and diethyl 6,6'-[ethane-1,2-diyl(or propane-1,3-diyl)diimino]bis(1-alkyl-5-benzoyl-2-oxo-1,2-dihydropyridine-3-carboxylates), depending on the reactant ratio. The sequence of formation of intermediate recyclization products was determined.
Recyclization of 1-alkyl-5-benzoyl-3-ethoxycarbonyl-6-methylthio-1,2-dihydro-pyridin-2-ones into 1,6-annelated derivatives of 3-alkylcarbamoyl-5-benzoylpyridin-2-one
作者:V. N. Britsun、A. N. Esipenko、A. V. Gootov、A. N. Chernega、M. O. Lozinskii
DOI:10.1007/s10593-009-0284-9
日期:2009.4
For the first time the possibility has been shown of recyclizing 1-alkyl-5-benzoyl-3-ethoxycarbonyl-6-methylthio-1,2-dihydropyridin-2-ones into 1,6-annelated bicyclic derivatives of 3-alkylcarbamoyl-5-benzoylpyridin-2-one, which takes place on reacting the former with 1,4- and 1,5-nitrogen-containing dinucleophiles. The structure of the recyclization products was demonstrated by spectral methods and X-ray structural analysis.
Heterocyclization of 3-(R-amino)-3-methylthio-1-phenylpropenones and 5-benzoyl-6-methylthio-1,2-dihydropyridin-2-ones with 1,2- and 1,3-dinucleophilic reagents
作者:V. N. Britsun、N. V. Pikun、A. B. Ryabitskii、M. O. Lozinskii
DOI:10.1007/s10593-011-0862-5
日期:2011.11
The interaction of 3-(R-amino)-3-methylthio-1-phenylpropenones and 1-alkyl-5-benzoyl-3-ethoxycarbonyl-6-methylthio-1,2-dihydropyridin-2-ones with N,N- and N, C-1,2- and 1,3-dinucleophiles proceeded regioselectively by [3+2] and [3+3] cyclocondensation with the formation of derivatives of pyrazole, benzimidazo[1,2-a]-pyridine, benzimidazo[1,2-a] pyrimidine, imidazo[1,2-a] pyrimidine, [1,2,4] triazolo[4,3-b]pyridazine, and 6,7-dihydro-2H-pyrazolo[3,4-b]pyridine. The regioselectivity of the reactions carried out was analyzed.
Unusual reaction of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-r-1,2-dihydropyridin-2-ones with nitrogen-containing 1,4-dinucleophiles
作者:V. N. Britsun、A. N. Esipenko、M. O. Lozinskii
DOI:10.1007/s10593-008-0124-3
日期:2008.7
The reaction of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-R-1,2-dihydropyridin-2-ones with the nitrogen-containing 1,4-dinucleophiles o-phenylenediamine, o-aminothiophenol, and ethylenediamine, proceeds as a recyclization, the products of which are derivatives of 5-(1H-benzimidazol-2-yl)-2H-2-pyranone, 5-(benzothiazol-2-yl)-2H-2-pyranone, and 5-(4,5-dihydro-1H-imidazol-2-yl)-2H-2-pyra-none respectively.
Unusual reaction of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-R-1,2-dihydropyridin-2-ones with 1,3-diaminopropane