A New Alternative for the Synthesis of Highly Functionalized Phosphoryl Derivatives
作者:H. Kraïem、H. Amri
DOI:10.1080/10426500701509329
日期:2007.9.13
Nucleophilic addition of diethylphosphite to Bayllis-Hillman acetate 5 in the presence of K2CO3 provides E and Z-allylphosphonates 6, which could be converted in the presence of N-bromosuccinimide (NBS) and benzoyl peroxide as catalyst into allylbromides 2. The primary one is further converted via an efficient tandem "formylation-hydrolysis" into the corresponding primary allylalcohol 8. The secondary allylbromides 2 react with TEAF via a beta-elimination to give buta-1,3-dienes 9.