Palladium-Catalyzed Carbene Insertion into Vinyl Halides and Trapping with Amines
摘要:
Palladium is shown to catalyze the three- component coupling of vinyl halides, trimethylsilyldiazomethane, and amines to generate allylamines. The mechanism is believed to involve formation of an R-Pd=CHSiMe3 intermediate that undergoes migration of the vinyl ligand to the empty p-orbital of the carbene ligand. The resulting eta(1)-allylpalladium species forms an eta(3)-allylpalladium intermediate that is trapped by the amine nucleophile. Under the conditions tested, cyclic secondary amines and terminal vinyl iodides give the best results.
Palladium-Catalyzed Carbene Insertion into Vinyl Halides and Trapping with Amines
摘要:
Palladium is shown to catalyze the three- component coupling of vinyl halides, trimethylsilyldiazomethane, and amines to generate allylamines. The mechanism is believed to involve formation of an R-Pd=CHSiMe3 intermediate that undergoes migration of the vinyl ligand to the empty p-orbital of the carbene ligand. The resulting eta(1)-allylpalladium species forms an eta(3)-allylpalladium intermediate that is trapped by the amine nucleophile. Under the conditions tested, cyclic secondary amines and terminal vinyl iodides give the best results.
Palladium-Catalyzed Carbene Insertion into Vinyl Halides and Trapping with Amines
作者:Sean K. J. Devine、David L. Van Vranken
DOI:10.1021/ol070758o
日期:2007.5.1
Palladium is shown to catalyze the three- component coupling of vinyl halides, trimethylsilyldiazomethane, and amines to generate allylamines. The mechanism is believed to involve formation of an R-Pd=CHSiMe3 intermediate that undergoes migration of the vinyl ligand to the empty p-orbital of the carbene ligand. The resulting eta(1)-allylpalladium species forms an eta(3)-allylpalladium intermediate that is trapped by the amine nucleophile. Under the conditions tested, cyclic secondary amines and terminal vinyl iodides give the best results.