Operationally Simple Copper-Promoted Coupling of Terminal Alkynes with Benzyl Halides
作者:Katherine A. Davies、Ryan C. Abel、Jeremy E. Wulff
DOI:10.1021/jo900444x
日期:2009.5.15
Benzyl chlorides and bromides are shown to undergo copper-promoted coupling with a variety of terminal alkynes including, for the first time, electron-poor acetylenes such as methyl propiolate. The reaction permits easy access to a wide range of (functionalized) benzyl-substituted propiolates (as well as several related alkynes) from commercially available benzyl halides. These products should in turn function as useful building blocks for the synthesis of previously inaccessible (functionalized) benzyl-substituted heterocycles.
noncovalent attractive interactions through fine-tuning of the remote substituents of the D2-symmetric chiral amidoporphyrin ligand. This noncovalent interaction strategy presents a solution that may be generally applicable in controlling reactivity and enantioselectivity in intermolecularradical reactions. The Co(II)-catalyzed intermolecular C-H amination, which operates under mild conditions with the C-H