期刊
RUSSIAN CHEMICAL BULLETIN
卷 52, 期 10, 页码 2207-2213出版社
SPRINGER
DOI: 10.1023/B:RUCB.0000011880.05561.c1
关键词
malononitrile; arylidenemalononitriles; 4-(3-cyanopyridin-2-ylthio)aceloacetic esters; 6-(3-ethoxycarbonyl-2-oxopropylthio)-1,4-dihydropyridine; 2-(pyrazol-5-ylmethylthio)pyridine; 2-(pyrazol-5-ylmethylthio)-1,4-dihydropyridine; pyrano[2,3-c]pyrazoles; X-ray diffraction analysis
Substituted 3-hydroxypyrazoles, which were prepared based oil ethyl esters of substituted 4-(pyridin-2-ylthio)- or 4-(1,4-diliydropyridin-2-vlthio)acetoacetic acids and hydrazine hydrate, were used in the synthesis of 6-amino-4-aryl-5-cyano-3-(pyridin-2-yithiometliyl)2,4-dihydropyrano[2,3-c]pyrazoles. The molecular and crystal structure of 6-amino-5-cyano-3-(3-cyaiio-4,6-dimethylpyridin-2-ylthiomethyl)-4-(2-nitrophenyl)-2,4-dihydropyrano[2.3-c]pyrazole was established by X-ray diffraction analysis.
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