Synthesis of (2r,6r)-1-chloro-2,6,10-trimethyl- urdicane

Details Synthesis of (2r,6r)-1-chloro-2,6,10-trimethyl- urdicane Synthesis of (2r,6r)-1-chloro-2,6,10-trimethyl- urdicane

C - Chemistry, Metallurgy

07

C

260/655

C07C 19/01 (2006.01) C07C 17/26 (2006.01) C07C 19/075 (2006.01) C07C 29/147 (2006.01) C07C 29/40 (2006.01) C07C 51/363 (2006.01) C07C 51/487 (2006.01) C07D 311/72 (2006.01)

Patent

CA 1191157

Abstract of the Disclosure: (2R,6R)-l-Chloro-2,6,10-tri- methyl-undecane I, (R)-(+)-.beta.-chloro isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)- l-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 C14-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: (II) (III) (IV) (V) (VII) + (IV) (I)

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