Treatment of substituted benzylidene anilines 1 a - f with cyclic CH-acidic compounds 2 a - m in ethanol at room temperature yields in additon/elimination reactions the corresponding arylidene derivatives 4 and the 2 : 1 adducts 5. The addition products 3, which are formed as intermediates, could not be isolated in any case. The donor/acceptor effect of the substituents on the benzylidene moiety influences to a significant extent the reactivity towards the azomethine carbon.
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.