ISSN:
1434-1948
Keywords:
Palladium
;
Bidentate nitrogen ligands
;
Carbohydrates
;
Alkenes
;
Enantioselectivity
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Chiral N,N-chelates of formula 6-Me-pyridine-2-CH=N-R (1) and R-N=CH-CH=N-R (2) (R = 6-deoxy-α-D-glucoside or 6-deoxy-α-D-mannoside residue) and their palladium(0) complexes [Pd(N,N-chelate)(olefin)] (I) were prepared. Symmetrical type 2 ligands induced higher enantioselectivity in the coordination of prochiral olefins. The ability of a type 1 chelate to promote a stereoselective process was also assessed, i.e. dimethylfumarate inserted into the Pd-Me bond formed upon methylation of a type I complex with 50% ee. Finally, a water-soluble Pd0 complex was also prepared by deprotecting the alcoholic functions on the sugar residue, and its molecular structure determined through X-ray diffractometry.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
Permalink
