Synthesis of Cannabinol by a Modified Ullmann-Ziegler Cross-Coupling
作者:Richard Göttlich、Max Nüllen
DOI:10.1055/s-0033-1338428
日期:——
Cannabinol, a pharmaceutically interesting component of cannabis, was prepared by a modified Ullmann–Ziegler cross-coupling. Using easily obtainable starting materials, this convergent approach allows facile access to a variety of cannabinol derivatives.
halogen bonding (XB) for the generation of aryl radicals from aryl halides under blue light irradiation and applied it in radical generation/1,5-hydrogen-atom transfer/radical cyclization cascade reactions for the synthesis of oxindoles and isoindolinones. On the basis of experimental studies, we propose that DBU can serve as a suitable XB acceptor with aryl halides for the formation of a photoactive
Pd-Catalyzed Dynamic Kinetic Enantioselective Arylation of Silylphosphines
作者:Vincent S. Chan、Robert G. Bergman、F. Dean Toste
DOI:10.1021/ja076457r
日期:2007.12.1
Palladium-catalyzed cross-couplings represent a powerful method for the formatioil of new bonds. A catalytic, enantioselective P-C bond-forming reaction proceeding via a Pd-mediated arylation of silylphosphines was developed for the synthesis of P-stereogenic phosphines. These useful and synthetically challenging phosphines can be made with a variety of functionalized aryl iodides; however, they proceed most enantioselectively with 2-iodo-N ,N -diisopropylbenzamides.