Process for removing farnesol from mixtures with...

Details Process for removing farnesol from mixtures with... Process for removing farnesol from mixtures with...

2008-07-15

2008-07-15

Eyler, Yvonne (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S162000, C562S005000

Reexamination Certificate

active

11553770

ABSTRACT:
Process for esterification of farnesol in an initial mixture comprising alpha-bisabolol, farnesol and optionally other components, with the following steps:1. Preparation or production of the initial mixture,2. Adding (i) a transesterification catalyst and (ii) one or more compounds of formula (B)in-line-formulae description="In-line Formulae" end="lead"?R2YnCO2R1  (B)in-line-formulae description="In-line Formulae" end="tail"?in which the following applies:R1stands for an alkyl residue with 1 to 12 C atoms;R2stands for hydrogen, an alkyl residue with 1 to 20 C atoms, a cycloalkyl residue with 5 to 20 C atoms, an aryl residue with 6 to 20 C atoms or a heteroaryl residue with 5 to 20 C atoms; andY stands for CH2, CH(Me), CH(Et), C(Me)2, CH2—CH(Me), CH(Me)-CH2or CH2—CH(Me)-CH2and n stands for a whole number from 0 to 6;orR2stands for a group CO2R3, R3standing for an alkyl residue with 1 to 12 C atoms; andY stands for CH2, CH(Me), CH(Et), C(Me)2, CH2—CH(Me), CH(Me)-CH2or CH2—CH(Me)-CH2and n stands for a whole number from 0 to 8, orY stands for an optionally substituted phenyl or naphthyl ring with a total of at most four substituents on the ring, n=1 applying.

REFERENCES:
Brieger, G. et al., The systnesis of trans, trans-alpha-farnesene, 1969, Journal of Organic Chemistry, vol., No. 12, pp. 3789.

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