Method for separation of isomers of azo compounds
AssigneeWako Pure Chemical Industries, Ltd.
InventorToshiyasu Ito
Life of this patent
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Abstract
A method for separation of a racemic isomer and a meso isomer from a mixture of a racemic isomer and a meso isomer of a compound shown by the general formula [1] 1 (wherein R1 and R2 are each independently a lower alkyl group or a cyano group, which are different from each other, R3 and R4 are each independently a lower alkyl group, and R5 is a hydrogen atom or a lower alkoxy group), which comprises treating the mixture with a water soluble organic solvent.
Claims22
A method for separation of a racemic isomer and a meso isomer from a mixture of a racemic isomer and a meso isomer of a compound shown by the general formula 7
- (wherein R1 and R2 are each independently a lower alkyl group or a cyano group, which are different from each other, R3 and R4 are each independently a lower alkyl group, and R5 is a hydrogen atom or a lower alkoxy group), which comprises treating the mixture with a water soluble organic solvent.
A method for recovering a racemic isomer of a compound shown by the general formula [1] 8
- (wherein R1 and R2 are each independently a lower alkyl group or a cyano group, which are different from each other, R3 and R4 are each independently a lower alkyl group, and R5 is a hydrogen atom or a lower alkoxy group), which comprises treating a mixture of a racemic isomer and a meso isomer of the compound shown by the above general formula [1] with a water soluble organic solvent.
Dependencies are inferred from the claim text.