The preparation and the cascade reactions of N-butadienyl-N-alkylketeneN,O-tert-butyldimethylsilyl acetals
作者:Andreas Franz、Pierre-Yves Eschler、Manuel Tharin、Reinhard Neier
DOI:10.1016/0040-4020(96)00646-1
日期:1996.8
The preparation of N-butadienyl-N-alkylketene N,O-tert-butyldimethylsilyl acetals (11a - d)from readily available starting materials is described. The cascade Diels-Alder reaction followed by acylation of these ketene acetals yields bicyclic and tricyclic products 7.13a,b and 14c,d with high diastereoselectivity.
的制备Ñ -butadienyl- Ñ -alkylketene Ñ,ö -叔丁基二甲基缩醛(11A - d)从容易获得的原料进行说明。级联Diels-Alder反应,然后将这些烯酮缩醛酰化,可得到具有高非对映选择性的双环和三环产物7.13a,b和14c,d。