Process for aqueous chromate ion oxidation of allylic halides an

Details Process for aqueous chromate ion oxidation of allylic halides an Process for aqueous chromate ion oxidation of allylic halides an

1978-05-08

1979-11-13

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260601R, 562459, 562577, 260600R, 260602, C07C 4500

Patent

active

041743520

ABSTRACT:
A process for preparing an allylic or an aromatic aldehyde, such as acrolein or benzaldehyde, the process comprising contacting in a basic, liquid, biphasic mixture and at reactive conditions an allylic halide or a halomethylated aromatic, such as allyl or benzyl chloride, with a divalent chromate ion, is improved by contacting the allylic halide or halomethylated aromatic with the divalent chromate ion in the presence of a catalytic amount of a quaternary ammonium and/or phosphonium salt, such as tetra-n-butylammonium chloride. The improved process is faster, cleaner and more complete than the process of the prior art.

REFERENCES:
patent: 3992432 (1976-11-01), Napier et al.
patent: 4061664 (1977-12-01), Wood
Cardillo et al., Jour. Chem. Soc. (London) Chem. Comm. (1976), p. 190.
Kulka, Amer. Perfumer Aromatics, vol. 69, (Feb. 1957), 31-33.
Kulka, Amer. Perfumer Aromatics, vol. 70 (Nov. 1957), 37-39.

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