Reactions of N-benzyl-pyridinium or -isoquinolinium ylides with ethyl 3-fluoro-3-(fluoroalkyl)acrylates to give fluoroalkyl-substituted indolizine and pyrrolo[2,1-a]isoquinoline derivatives
Abstract
In the presence of base, N-benzylpyridinium and N-benzylisoquinolinium ylides generated in situ from the N-benzyl-pyridinium or -isoquinolinium bromides react with ethyl 3-fluoro-3-fluoroalkyl(except bromodifluoromethyl)acrylates to give one or two fluoroalkylated indolizine and pyrrolo[2,1-a]isoquinoline derivatives through