Preparation of alkenols

Details Preparation of alkenols Preparation of alkenols

C - Chemistry, Metallurgy

07

C

C07C 33/025 (2006.01) C07C 29/44 (2006.01)

Patent

CA 2083653

O.Z. 0050/42925 Abstract of the disclosure: A process for preparing alkenols of the formula I R1-CH=CH(CH2)nOH I where R1 is hydrogen or a hydrocarbon radical, and n is an integer from 3 to 15, a) by reacting a phosphonium salt of the formula IIa R1-CH2-P+(C6H5)3X- IIa where X is chlorine, bromine or iodine, with an aldehyde of the formula IIIa or its hemiacetal of the formula IIIb Image Image IIIa IIIb or b) by reacting a phosphonium salt of the formula IIb (C6H5)3P+(CH2)n+1OH X- IIb with a aldehyde of the formula IV R1CHO IV in a solvent in the presence of a base, wherein the base is the alkali metal salt of an alcohol and the solvent is an alcohol.

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