Preparation of Chiral Diphenylphosphines from D-Glucose and Enantioselective Hydrogenation with Their Rhl ComplexesReportar como inadecuado




Preparation of Chiral Diphenylphosphines from D-Glucose and Enantioselective Hydrogenation with Their Rhl Complexes - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Croatica Chemica Acta, Vol.61 No.4 December 1988. -

2R,3S-2-Methylsulfonyloxymeihyl-3-methylsulfonyloxy-tetrahydropyran 4, derived from n-glucose, is diphenylphosphinated to 2R,3R-2-diphenylphosphinomethyl-3-diphenylphosphino-tetrahydropyran 7, which is formed as aminor product. Compound 8 is the predominant product, formed on 3,4-elimination. Preparation

and characterization of the rhodiumI complexes 10-12 is described.

Complex 10 of bidentate Iigand 7 exhibits in hydrogenation of Z-a-N-acetylaminocinnamic acid enantioselectivity comparable to that obtained with rhodiumI complex of -DIOP -70010e. e

Saturated monophosphine, 2S-2-diphenylphosphinomethyl-tetrahydropyran 9 affords mixed rhodiumI complex 11, 12, which exhibits low enantioselectivity.



Autor: Ivan Habuš - ; Rudjer Bošković Institute, Department of Organic Chemistry and Biochemistry, P.O.B. 1016, 41001 Zagreb, Yugosla

Fuente: http://hrcak.srce.hr/



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