Transition metal complexes of N-heterocyclic carbenes, method of preparation and use in transition metal catalyzed organic transformations
申请人:Organ G. Michael
公开号:US20070073055A1
公开(公告)日:2007-03-29
The present invention relates to catalysts of transition metal complexes of N-heterocyclic carbenes, their methods of preparation and their use in chemical synthesis. The synthesis, ease-of-use, and activity of the compounds of the present invention are substantial improvements over in situ catalyst generation. Further, the transition metal complexes of N-heterocyclic carbenes of the present invention may be used as precatalysts in metal-catalyzed cross-coupling reactions.
A general efficient electrochemical method for the preparation of aryl- and heteroarylpyridazines in a nickel-catalyzed cross-coupling reaction of 3-chloro-6-methoxypyridazine and 3-chloro-6-methylpyridazine with a range of functionalized aryl or heteroaryl halides is reported.
US7250510B2
申请人:——
公开号:US7250510B2
公开(公告)日:2007-07-31
Biaryls Made Easy: PEPPSI and the Kumada-Tamao-Corriu Reaction
作者:Michael G. Organ、Mirvat Abdel-Hadi、Stephanie Avola、Niloufar Hadei、Joanna Nasielski、Christopher J. O'Brien、Cory Valente
DOI:10.1002/chem.200601360
日期:2007.1
Initiation) precatalysts 1 and 2 is detailed. The ease-of-use of these catalysts and the synthesis of a wide range of hinderedbiaryls, large coupling partners and drug-like heterocycles, in high yield, makes the PEPPSI-KTC protocol very attractive. The high reactivity of the PEPPSI system allowed a tetra-ortho-substituted heterocycle, 11 to be synthesized at room temperature for the first time using any