Dienophilie des cyano-1 enamines, nouveaux equivalents de cetenes pour les cycloadditions de diels-alder
作者:Jean-Luc Boucher、Lucien Stella
DOI:10.1016/s0040-4020(01)96404-x
日期:1985.1
The Diels-Alder reactivity of two captodative olefins, 2-morpho-lino-acrylonitrile 15 and 2-(N-methlanilino) -acrylonitrile 16, towards four conjugated dienes is evaluated.In every cases, isomeric 4+2} cyclo-adducts are obtained.With olefin 15 yields are better than with olefin 16. The adducts are easily transformed in to the corresponding ketones by a mild hydrolysis of the α-aminonitrile group.
评估了两种俘获性烯烃2-吗啉-亚麻基丙烯腈15和2-(N-甲基兰尼诺)-丙烯腈16对四个共轭二烯的Diels-Alder反应性。在每种情况下,异构体4 + 2}环加合物用烯烃15,其收率要好于用烯烃16。该加合物易于通过α-氨基腈基团的温和水解而转变成相应的酮。因此,可以将1-氰基烯胺视为对于不饱和环己酮的合成非常有用的良好的乙烯酮当量。