From Dimethylamine to Pyrrolidine: The Development of an Improved Nickel Pincer Complex for Cross-Coupling of Nonactivated Secondary Alkyl Halides
摘要:
Replacement of a dimethyl amino group of the amidobis(amine) nickel(II) pincer complex (1), [((N2N)-N-Me)-Ni-Cl], by a pyrrolidino group resulted in a new nickel(II) pincer complex (2), [((PNNN)-N-yr-N-Me)Ni-Cl]. Complex 2 is an efficient catalyst for Kumada and Suzuki-Miyaura cross-coupling of nonactivated secondary alkyl halides, while complex 1 is largely inactive. The significant activity difference is tentatively attributed to a minimal structural difference, which leads to a more hemilabile ligand.
作者:Samantha A. Green、Jeishla L. M. Matos、Akiko Yagi、Ryan A. Shenvi
DOI:10.1021/jacs.6b08507
日期:2016.10.5
A combination of cobalt and nickel catalytic cycles enables a highly branch-selective (Markovnikov) olefin hydroarylation. Radical cyclization and ring scission experiments are consistent with hydrogenatomtransfer (HAT) generation of a carbon-centered radical that leads to engagement of a nickel cycle.
Glycolipids And Analogues Thereof As Antigens For NKT Cells
申请人:Tsuji Moriya
公开号:US20070238871A1
公开(公告)日:2007-10-11
This invention relates to immunogenic compounds which serve as ligands for NKT (natural killer T) cells and to methods of use thereof in modulating immune responses.
GLYCOLIPIDS AND ANALOGUES THEREOF AS ANTIGENS FOR NKT CELLS
申请人:TSUJI Moriya
公开号:US20120258142A1
公开(公告)日:2012-10-11
This invention relates to immunogenic compounds which serve as ligands for NKT (natural killer T) cells and to methods of use thereof in modulating immune responses.