Fused β-lactams via intramolecular dipolar cycloaddition
作者:K.S.Keshava Murthy、Alfred Hassner
DOI:10.1016/s0040-4039(00)95659-4
日期:1987.1
Two routes were examined that permit conversion of 4-vinyl-2-azetidinones via intramolecular nitrile oxide-olefin or azide-olefin cycloaddition into tricyclic β-lactams. Stereoselectivity in these cycloadditions as well as further chemoselective transformation of the products were shown to be dependent on the size of the newly formed ring.