1,3-Dipolar cycloaddition reactions of pyrazolidinium ylides with vinyl sulfones. A regioselective synthesis of bicyclic pyrazolidinone antibacterial agents
作者:Louis N. Jungheim、Charles J. Barnett、Joseph E. Gray、Linus H. Horcher、Timothy A. Shepherd、Sandra K. Sigmund
DOI:10.1016/s0040-4020(01)85943-3
日期:1988.1
The 1, 3-dipolar cycloadditionreaction of pyrazolidinium ylide with substituted vinylsulfones was studied. Elimination of benzenesulfinic acid from the resulting cycloadducts gave rise to bicyclic pyrazolidinones . The (E)-olefin isomers were found to undergo cycloaddition in a highly regioselective fashion. These pyrazolidinones represent the nuclei of an exciting new class of potent antibacterial