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ChemInform Abstract: Synthesis of (-)-(4R,5R)-4,5-Bis [di-3′-(2′,6′-dimethoxypyridyl)phosphinomethyl] -2,2-dimethyl-1,3-dioxolane and Its Application in the Rh-Catalyzed Asymmetric Hydrogenation Reactions.

✍ Scribed by Wenhao Hu; Chih-Chiang Chen; Guoping Xue; Albert S. C. Chan

Publisher: John Wiley and Sons
Year: 2010
Weight: 36 KB
Volume: 30
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199924026

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✦ Synopsis

1999 stereochemistry stereochemistry (general, optical resolution) O 0030 24 -026 Synthesis of (-)-(4R,5R)-4,5-Bis [di-3'-(2',6'dimethoxypyridyl)phosphinomethyl] -2,2-dimethyl-1,3-dioxolane and Its Application in the Rh-Catalyzed Asymmetric Hydrogenation Reactions. -Asymmetric hydrogenations of a series of prochiral olefins are investigated using a rhodium catalyst containing the new ligand (I). Compared to the known Rh-(R,R)-DIOP, the products have opposite configuration and the hydrogenation of aminoacrylic acid methyl esters gives higher e.e. values compared to the acid [cf. (IIIa) and (IIIb)]. -(HU, WENHAO; CHEN,

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