Preparation of unsaturated alcohols

Details Preparation of unsaturated alcohols Preparation of unsaturated alcohols

Filed on

1980-07-08

Date issued

1984-06-19

Examiner

Evans, J. E.

Patent Class

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

SubClass

Organic compounds

SubSubClass

Oxygen containing

Other Related Categories

568813, 568881, C07C 2914, C07C 3302, C07C 3303, C07C 3320

Type

Patent

Status

active

Patent number

044554427

Description

ABSTRACT:
Olefinically unsaturated alcohols (I) are prepared by selective hydrogenation of the corresponding carbonyl compounds (II) in the liquid phase with hydrogen, using an Ru, Rh, Os, Ir or Pt catalyst and carrying out the hydrogenation in the presence of from 5 to 40% by weight, based on (II), of a tertiary amine.
The process is of particular importance for the selective hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds (IIa) and amongst these specifically for the hydrogenation of citral to geraniol and nerol.
The preferred amine is trimethylamine.

REFERENCES:
patent: 3284517 (1966-11-01), Rylander et al.
patent: 3655777 (1972-04-01), Rylander et al.
patent: 3953524 (1976-04-01), Steiner
patent: 4041083 (1977-08-01), Gradeff et al.
patent: 4073813 (1978-02-01), Cordier
patent: 4100180 (1978-07-01), Ichikawa et al.
Bakhanova et al., "Izv. Akad. SSR, Ser. Khima", (1972), pp. 1934-1938.
Rylander et al., "Tetrahedron Letters", No. 20, (1969), pp. 1579, 1580.
Tuley et al., "J. Amer. Chem. Soc.", 47, (1925), pp. 3061-3068.

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