Synthesis of polycyclic lactams via intramolecular dipolar cycloadditions of stabilized azomethine ylides
作者:Stephen F. Martin、Tom H. Cheavens
DOI:10.1016/s0040-4039(01)93412-4
日期:——
stereoselective two step sequence for the construction of fused pyrrolidone ring systems has been developed which features the intramolecular [3+2] dipolar cycloaddition of unsaturated azomethine ylides. The ylides are produced upon reaction of aminomethylphosphonates with α,ω-olefinic aldehydes, followed by oxidative removal of the phosphonate ester group using a newly developed method.