Synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives
2005
In reaction of 2-(2-thienyl)- and 2-(2-furyl)acrylonitriles with 3-methyl-1-phenyl-5-pyrazolone in the presence of basic catalysts 4-thienyl- and 4-furyl derivatives of 3,5-dimethyl-1,7-diphenyl-4,8-dihydropyrano-[2,3-c, 5,6-c]dipyrazole were obtained.
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