The Journal of Organic Chemistry

Oxidative cyclization of arylhydrazones of chalcones and benzalacetones to pyrazoles by thianthrene cation radical

AC Kovelesky, HJ Shine

文献索引：Kovelesky, Albert C.; Shine, Henry J. Journal of Organic Chemistry, 1988 , vol. 53, # 9 p. 1973 - 1979

全文：HTML全文

被引用次数: 25

摘要

Phenyl-,@-nitropheny1)-, and (2, 4-dinitrophenyl) hydrazones of chalcone (benzalacetophenone), benzalacetone, and of some of their derivatives undergo oxidative cyclization in reactions with thianthrene cation radical perchlorate. The products are, respectively, 1, 3, 5-triaryl-(3) and 3-methyl-l, 5-diarylpyrazoles (4) and are formed in excellent yields. Cyclization appears to occur by way of the arylhydrazone cation radical ...