Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1980-05-15
1981-12-15
Helfin, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568431, 568424, C07C 4538
Patent
active
043060838
ABSTRACT:
In a two-phase liquid medium comprising an aqueous alkaline solution and an organic solvent, molecular oxygen and a noble metal-containing catalyst can be used to oxidize aryl-substituted alcohols of the formula AR(--CH.dbd.CH--).sub.n CH.sub.2 OH wherein n is 0, 1 or 2, to the corresponding aldehydes. More specifically, the oxidation of an aromatic alcohol, such as p-methoxybenzyl alcohol, can be efficiently carried out in a multiphase system comprising a 5 percent palladium-on-charcoal catalyst, an organic solvent such as methylene chloride, in contact with an aqueous sodium hydroxide solution, in the presence of air or oxygen with good agitation followed by separation of the two phases, recovery of the aldehyde product from the organic solvent and recycle of the aqueous phase without neutralization.
REFERENCES:
patent: 4119671 (1978-10-01), Baver et al.
Deline Douglas N.
Helfin Bernard
Hill Joyce P.
The Dow Chemical Company
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