Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1997-04-28
1999-04-06
Richter, Johann
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D31104
Patent
active
058920587
ABSTRACT:
A method of producing .alpha.-tocopherol from non-.alpha.-tocopherols is disclosed. In the disclosed method, non-.alpha.-tocopherols are hydroxymethylated and reduced to .alpha.-tocopherol in a single step by reacting formaldehyde or a formaldehyde-producing compound with the non-.alpha.-tocopherol under catalytic reducing conditions in a reaction mixture containing the non-.alpha.-tocopherol, formaldehyde or formaldehyde-producing compound and boric acid or a boric acid-producing compound dispersed in a solvent of an azeotropic mixture of trimethyl borate and methanol and a non-polar organic solvent.
REFERENCES:
patent: 3338922 (1967-08-01), Kijima et al.
patent: 3819657 (1974-06-01), Baldwin et al.
Bruggemann Konrad
Herguijuela Juan Ramon
Netscher Thomas
Riegl Johann
Johnston George W.
Pokras Bruce A.
Richter Johann
Roche Vitamins Inc.
Solola Taofiq A.
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