1,3-Dipolar cycloaddition of nitrones with 1,1-difluoroolefins gives rise to fluorinated isoxazolidines in 85% yield; subsequent Raney nickel reduction of the cycloadducts produces beta-lactams.
1,3-Dipolar cycloaddition of nitrones with 1,1-difluoroolefins gives rise to fluorinated isoxazolidines in 85% yield; subsequent Raney nickel reduction of the cycloadducts produces beta-lactams.