Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 12, Issue 7, Pages 1855-1874Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200501261
Keywords
epoxidation; homogeneous catalysis; N ligands; olefins; ruthenium
Categories
Ask authors/readers for more resources
The synthesis of chiral tridentate N,N,N-pyridine-2,6-bisoxazolines 3 (pybox ligands) and N,N,N-pyridine-2,6-bisoxazines 4 (pyboxazine ligands) is described in detail. These novel ligands constitute a useful toolbox for the application in asymmetric catalysis. Compounds 3 and 4 are conveniently prepared by cyclization of enantiomerically pure alpha- or beta-amino alcohols with dimethyl pyridine-2,6-dicarboximidate. The corresponding ruthenium complexes are efficient asymmetric epoxidation catalysts and have been prepared in good yield and fully characterized by spectroscopic means. Four of these ruthenium complexes have been characterized by X-ray crystallography. For the first time the molecular structure of a pyboxazine complex {2,6bis-[(4S)-4-phenyl-5,6-dihydro-4H- [1,3] oxazinyl] pyridine} (pyridine-2,6-dicarboxylate) ruthenium (S)-2aa, is presented.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available