New chiral bidentate ligands containing thiazolyl and pyridyl donors for copper-catalyzed asymmetric allylic oxidation of cyclohexene
作者:Pang-Fei Teng、Chui-Shan Tsang、Ho-Lun Yeung、Wing-Leung Wong、Hoi-Lun Kwong、Ian D. Williams
DOI:10.1016/j.jorganchem.2005.11.003
日期:2006.5
Chiral bidentate ligands 1–3, which contain a combination of thiazolyl and pyridyl donors units, were prepared. The syntheses are facile and being based on Kröhnke condensation of a pinene derivative to form the pyridine ring. Modification at the 8-position of the tetrahydroquinoline ring can be carried out by alkylation reaction with 2a and 3a but not 1a. The structure of a copper(II) perchlorate