Acetylenic carbamates. III. The N-cycloaliphatic derivatives
作者:Robert D. Dillard、G. A. Poore、Nelson R. Easton、M. J. Sweeney、W. R. Gibson
DOI:10.1021/jm00312a011
日期:1968.11
BF<sub>3</sub>·Et<sub>2</sub>O-Promoted Cleavage of the C<sub>sp</sub>–C<sub>sp2</sub> Bond of 2-Propynolphenols/Anilines: Route to C2-Alkenylated Benzoxazoles and Benzimidazoles
A novel BF3 center dot Et2O-promoted tandem reaction of easily prepared 2-propynolphenols/anilines and trimethylsilyl azide is developed to give C2-alkenylated benzoxazoles and benzimidazoles in moderate to good yields. Most reactions could be accomplished in 30 min at room temperature. This tandem process involves a C-sp-C-sp2 bond cleavage and a C-N bond formation. Moreover, both tertiary and secondary propargylic alcohols with diverse functional groups were tolerated under the mild conditions.
Acetylenic Carbamates. A New Class of Potential Oncolytic Agents
作者:Robert D. Dillard、Gerald. Poore、Donald R. Cassady、Nelson R. Easton