Simple and Advantageneous Stereoselective Synthesis of (Z)-Allyl Phosphonates Starting from Baylis–Hillman Adducts
摘要:
Baylis-Hillman adducts 3-hydroxyl-2-methylene alkanoates have been converted in one pot into the corresponding (Z)-allyl phosphonates by treatment with FeCl3 and trialkyl phosphites in toluene under reflux. The products are formed in excellent yields (88-98%) within 1-1.5 h. The process is highly convenient and efficient, cost-effective, and remarkably stereoselective.