2-Methylene-1,3-dicarbonylcompounds reacted with alky vinylethers in benzene to give hetero-Diels–Alderreaction products, 3,4-dihydro-2H-pyrans, regioselectively and/or chemoselectively.
A facile conversion of ethoxydihydropyrans to 4-cyanoethylisoxazoles
作者:M. Yamauchi、S. Akiyama、T. Watanabe、K. Okamura、T. Date
DOI:10.1002/jhet.5570330229
日期:1996.3
The reaction of ethoxydihydropyrans 2, which were prepared from 2-methylene-1,3-dicarbonyl compounds 1 with ethyl vinyl ether, and hydroxylamine hydrochloride gave 4-cyanoethylisoxazoles 3 whose substituents at the 3 and 5 positions were transformed from substituent at the 2 position and the acyl group of 2 regioselectively.
作者:Masashige Yamauchi、Shin-Ichi Akiyama、Toshio Watanabe、Kimio Okamura、Tadamasa Date
DOI:10.1039/c39930000017
日期:——
The reaction of dihydropyrans 1 with hydroxylamine hydrochloride gave 4-cyanoethylisoxazoles 2 whose substituents at the 3 and 5 positions were transformed from substituent at the 6 position and the acyl group of 1 regioselectively.