Knoevenagel type condensation of 4-unsubstituted isoxazolinones with ketones or aldehydes followed by Michael addition of a nucleophile — hydride, cyanide, or phosphite— and exposure of the adduct to sodium nitrite/aqueous acetic acid and ferrous sulfate gives variously functionalised alkynes.
3,4-Disubstituted lsoxazolin-5-ones by Sodium Borohydride Reduction of 4-Arylmethylene- and 4-Alkylideneisoxazol-5(4<i>H</i>)-ones
作者:Egle M. Beccalli、Tiziana Benincori、Alessandro Marchesini
DOI:10.1055/s-1988-27738
日期:——
Reduction of 4-arylmethylene- and 4-alkylidenisoxazol-5(4H)-ones with sodium borohydride affords the corresponding 3,4-disubstituted isoxazol-5(4H)-ones.