Process for preparation of branched 1,3-glycols and their monoes

Details Process for preparation of branched 1,3-glycols and their monoes Process for preparation of branched 1,3-glycols and their monoes

1991-12-26

1992-11-24

Prescott, Arthur C.

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

Organic compounds

Carboxylic acid esters

568252, C07C 6700

Patent

active

051664135

ABSTRACT:
The present invention relates to a process for the preparation of diols of the general formula (I) ##STR1## and monoesters thereof of the general formula (II) ##STR2## and the general formula (III) ##STR3## wherein R.sub.1 and R.sub.2 are the same of different groups and each denotes a lower alkyl group having 1 to 4 carbon atoms, preferably a methyl group. The process of this invention comprises condensing in a multi-phase reaction environment an aldehyde containing a hydrogen atom in the alpha position and having the general formula (IV) ##STR4## wherein R.sub.1 and R.sub.2 having the meaning given above, in the presence of a catalytic system consisting of a phase transferring catalyst and an alkaline substance.

REFERENCES:
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patent: 3291821 (1966-12-01), Perry et al.
patent: 3703541 (1972-11-01), Takasu et al.
patent: 3718689 (1973-02-01), McCain et al.
patent: 3816533 (1974-06-01), Brandstrom et al.
patent: 4225726 (1980-09-01), Morris et al.
patent: 4273934 (1981-06-01), Merger et al.
patent: 4883906 (1989-11-01), Argyropoulos et al.
Chemical Abstracts 90:103440f (1979).

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