期刊
MOLECULES
卷 18, 期 1, 页码 535-544出版社
MDPI
DOI: 10.3390/molecules18010535
关键词
enaminonitriles; 4-aminopyrazole; Thorpe-Ziegler cyclization; microwave irradiation
Benzylcyanide and 4-nitrobenzylcyanide condensed with triethyl orthoformate and piperidine or morpholine to yield 2-aryl-2-piperidinyl or 2-morpholinylacrylonitriles. These coupled with aromatic diazonium salts to yield the 2-arylhydrazno-2-arylethane nitriles in good yields. The latter were converted into 4-aminopyrazoles in good yields using the Thorpe-Ziegler cyclization.
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