Patent · US Expired

Preparation of phenylacetaldehydes

US4929765A · kind A · utility

2Cited by

2References

6Claims

0Family size

Assignee

BASF SE

Inventors

Hubert Smuda · Heidelberg, DE
Wolfgang Hoelderich · Bischofswerda, DE
Norbert Goetz
Hans-Gert Recker · Ludwigshafen, DE

Key dates

Filing date	Nov 22, 1988
Grant date	May 29, 1990
Priority date	—
Expiry date	Nov 22, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Phenylacetaldehydes of the general formula I ##STR1## where R.sup.1 to R.sup.5 are each independently of the others hydrogen, alkyl, alkoxy, halogen, haloalkyl, haloalkoxy or haloalkylthio, by catalytic rearrangement in the presence of a zeolite, are prepared by reacting an epoxy of the formula II or a phenylglycol of the formula III ##STR2## where Y and Z can be identical to or different from each other and are each hydroxyl, alkoxy, aryloxy or acyloxy, in the gas phase over a borosilicate zeolite catalyst at from 70.degree. to 200.degree. C. under reduced pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.