Cyanoethylation of pyrazoles under conditions of phase-transfer catalysis and hydrogenation of the cyanoethylation products
摘要:
Cyanoethylation of pyrazoles with acrylonitrile was studied under conditions of phase-transfer catalysis. The ease of the process depends on the acidity of pyrazoles. Cyanoethylpyrazoles can be converted into the corresponding aminopropylpyrazoles via reduction of the cyano group. The reduction with lithium tetrahydridoaluminate is accompanied by beta-elimination of the cyanoethyl group.