ISSN:
1434-193X
Keywords:
2-Amino-1,1,2-triphenylethanol
;
Bridging ligands
;
Crystal structure
;
Diastereoselectivity
;
Titanium
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The imines 4 containing a diphenylcarbinol moiety serve as chiral ligands in novel enantiomerically pure imine-alkoxytitanium(IV) complexes. Depending on the molar ratio of the starting materials, imines 4 and titanium tetraisopropoxide, mono-chelated complexes 5 or bis-chelated complexes 6/7 result. The latter are formed diastereoselectively and the isomers 6 are main or exclusive products. Their (A) configuration is determined by a crystal-structure analysis of 6b. The bis-ligand complexes 6 or mixtures of 6/7, which are found to be remarkably stable, are used as precursors not only for the reactive dihalo complexes 8a/8b but also for the preparation of the mixed chloroisopropoxytitanium complex 8c.
Type of Medium:
Electronic Resource
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