posted on 2013-08-02, 00:00authored byYancheng Hu, Ruxia Yi, Fan Wu, Boshun Wan
Silver(I)-catalyzed
[3,3] rearrangement of N-sulfonyl propargylamides
affords functionalized oxazoles with highly regioselective migration
of the sulfonyl group by the introduction of acyloxy groups. The allenylamides,
generated from the corresponding propargylamides, can also undergo
the silver-catalyzed cyclization to give various 5-vinyloxazoles.