Preparation of .alpha.-tocopherol

Details Preparation of .alpha.-tocopherol Preparation of .alpha.-tocopherol

1995-08-17

1996-04-02

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31176

Patent

active

055042201

ABSTRACT:
Disclosed is an improved process for the preparation of alpha-tocopherol by the hydroxymethylation followed by the hydrogenation of non-.alpha.-tocopherols comprising .beta.-, .gamma.-, and .delta.-tocopherols using a particular palladium on alumina catalyst wherein (1) the dispersion and depth of deposition of the palladium metal are within certain ranges, and (2) the alumina is of a particular crystalline phase.

REFERENCES:
patent: 3819657 (1974-06-01), Baldwin et al.
patent: 4239691 (1980-12-01), Nelan et al.
Chemical Abstract 112:139622--Abstract of EP 338,429 A2 (.delta.).
Chemical Abstract 106:50511--Abstract of JP 60-237,085 (.delta.).
Chemical Abstract 105:191442--Abstract of EP 1,784,000 A1 (.delta.).
Brunsuer, S., Emmet, P. H. and Teller, E., J. Am. Chem. Soc., 60, 309-16 @(1938).

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