Preparation of .alpha.-tocopherol

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

1984-03-12

1985-10-29

Love, Ethel G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31172

Patent

active

045501823

ABSTRACT:
A process for the preparation of .alpha.-tocopherol of the formula I ##STR1## by reacting a chroman derivative with a C.sub.14 -Grignard reagent using a di-alkali metal tetrahalocuprate catalyst in a Schlosser-Fouquet reaction, wherein a chroman derivative of the general formula II ##STR2## where Y is a leaving group, especially Br, is used and is reacted, at from -70.degree. to 0.degree. C., first with a solution of about 1 equivalent of a Grignard compound of the general formula III

REFERENCES:
patent: 3139442 (1964-06-01), Rudner et al.
patent: 4051153 (1977-09-01), Cohen et al.
patent: 4086249 (1978-04-01), Chan et al.

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