Modified lithium aluminum hydrides

Details Modified lithium aluminum hydrides Modified lithium aluminum hydrides

C - Chemistry, Metallurgy

07

C

260/433, 260/626

C07C 43/275 (2006.01) C07C 43/23 (2006.01) C07F 5/06 (2006.01)

Patent

CA 1142950

ABSTRACT OF THE DISCLOSURE: Novel modified lithium aluminum hydride type reducing agents obtained by reacting one equivalent of lithium aluminum hydride with one equivalent of an opti- cally active N-substituted ephedrine of the formula, Image wherein R1 is a C1 - C4 alkyl group or benzyl group, and Ph is phenyl group) and two equivalents of an N-substituted aniline of the formula, Image (wherein R2 is a C1 - C4 alkyl group or phenyl group, and Ph is phenyl group). This reducing agent is usable for reducing the organic compounds having a carbonyl group (ketone group or aldehyde group) in their structure into the corresponding alcohols. It is particularly useful as a reducing agent for asymmetrically reducing the unsym- metrical ketones to selectively produce either an alco- hol in which the asymmetric carbon atom bonded to the hydroxy group is in R-configuration or an alcohol in which said asymmetric carbon atom is in S-configuration.

372229

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