Preparation of phenylacetaldehydes

Details Preparation of phenylacetaldehydes Preparation of phenylacetaldehydes

1988-11-22

1990-05-29

Lone, Warren B.

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

Organic compounds

Oxygen containing

568 41, 568 43, 568 63, 568 67, 568627, 568663, 568637, C07C 4567, C07C 4570

Patent

active

049297651

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.

REFERENCES:
patent: 3860614 (1975-01-01), Watson
patent: 4495371 (1985-01-01), Neri et al.

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