Spiro β-lactam thiadiazoline and triazoline systems. Comparison with the chemistry of spiro β-lactam oxadiazolines
作者:Michel Zoghbi、Warkentin John
DOI:10.1016/s0040-4020(01)80552-4
日期:1993.1
Triazoline, oxadiazoline, and thiadiazoline ring systems spiro-fused to C4 of a beta-lactam ring undergo 1,3-dipolar cycloreversion to form azomethine-, carbonyl-, and thiocarbonyl ylides, respectively. The order of reactivities is triazoline > thiadiazoline > oxadiazoline.