DIVERSE CYCLOADDITION CHEMISTRY LEADING TO OVERALL MICHAEL ADDITION IN THE REACTIONS OF 1,1-BIS(DIMETHYLAMINO)-2,2-DIFLUOROETHENE WITH ALPHA,BETA-UNSATURATED ALDEHYDES, KETONES, ESTERS, AND NITRILES
Yl. Xu et Wr. Dolbier, DIVERSE CYCLOADDITION CHEMISTRY LEADING TO OVERALL MICHAEL ADDITION IN THE REACTIONS OF 1,1-BIS(DIMETHYLAMINO)-2,2-DIFLUOROETHENE WITH ALPHA,BETA-UNSATURATED ALDEHYDES, KETONES, ESTERS, AND NITRILES, Journal of organic chemistry, 62(19), 1997, pp. 6503-6506
Difluoro ketene aminal 1 undergoes [2 + 4] cycloadditions with alpha,b
eta-unsaturated aldehydes and ketones and [2 + 2] cycloadditions with
alpha,beta-unsaturated esters and nitriles. Both types of adducts can
be readily converted, by mild hydrolysis, to the respective Michael ad
dition products.