Palladium-catalyzed aerobic oxidative aminocarbonylation and alkoxycarbonylation reactions with aryl hydrazines as coupling partners have been developed. The oxidative carbonylation of aryl hydrazines proceeded smoothly at atmospheric pressure CO, employing molecular oxygen as the terminal oxidant. The only byproducts were nitrogen gas and water for both reactions. Notably, no double carbonylation
Palladium-Catalyzed Carbonylation Reactions of Aryl Bromides at Atmospheric Pressure: A General System Based on Xantphos
作者:Joseph R. Martinelli、Donald A. Watson、Dominique M. M. Freckmann、Timothy E. Barder、Stephen L. Buchwald
DOI:10.1021/jo801279r
日期:2008.9.19
A method for the Pd-catalyzed carbonylation of aryl bromides has been developed usingXantphos as the ligand. This method is effective for the direct synthesis of Weinreb amides, primary and secondary benzamides, and methyl esters from the corresponding aryl bromides at atmosphericpressure. In addition, a putative catalytic intermediate, (Xanphos)Pd(Br)benzoyl, was prepared and an X-ray crystal structure
The present invention provides a compound of Formula (I)
as described herein, or a pharmaceutically acceptable salt or a solvate thereof. The present invention also provides pharmaceutical compositions comprising one or more said compounds, and methods for using said compounds for treating or preventing a thromboses, embolisms, hypercoagulability or fibrotic changes.