Process for the preparation of dihalobutyraldehydes

Details Process for the preparation of dihalobutyraldehydes Process for the preparation of dihalobutyraldehydes

1990-01-16

1991-05-14

Lone, Werren B.

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

Organic compounds

Oxygen containing

568458, 568462, 568495, C07C 4561, C07C 4714

Patent

active

050157809

ABSTRACT:
Dihalobutyraldehydes of formula I ##STR1## wherein X and Y are each independently of the other Cl or Br, are obtainable at high rates of conversion and with excellent selectivities by catalytic dehalogenation with hydrogen by carrying out the reaction with appropriate .alpha.,.alpha.-dihalobutyraldehydes in an organic aprotic solvent. The dihalobutyraldehydes are intermediates for the synthesis of herbicidal acyl cyclohexanediones.

REFERENCES:
patent: 3996292 (1976-12-01), Decor
patent: 4008279 (1977-02-01), Blay
patent: 4190606 (1980-02-01), Blay
patent: 4613702 (1986-09-01), Leconte
Houben-Weyl, vol. 4/1C, p. 373 (1980).
Helv. Chim. Acta, vol. 27, p. 185 (1958).

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