Patent · US Expired

Optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol and their preparation

US4518813A · kind A · utility

1Cited by

3References

4Claims

0Family size

Assignee

BASF SE

Inventors

Hansgeorg Ernst · Speyer, DE
Friedrich Vogel · Monsheim, DE
Joachim Paust · Schifferstadt, DE

Key dates

Filing date	Sep 30, 1982
Grant date	May 21, 1985
Priority date	—
Expiry date	Sep 30, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07B2200/07
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

(2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)-.beta.-chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol. In the process according to the invention, the optically active C.sub.14 -chloride I is obtained in 6 simple reaction steps starting from II, via the novel intermediates IV and V, in accordance with the following equation: ##STR1##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.