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US 4,045,475 AGranted
Optically active alcohols and lower esters thereof
AssigneeHoffmann-La Roche Inc.
InventorsKa-Kong Chan, Gabriel Saucy
Life of this patent
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Abstract
Asymmetric synthesis of optically active 3,7,11-trimethyl-dodecan-1-ol, an intermediate for producing optically active vitamin E, from isovaleraldehyde or prenal including intermediates in this synthesis.
Claims6
A compound of the formula:
- ##STR34## wherein A and B are individually hydrogen or, taken together, form a carbon to carbon bond;
- one of R.sub.1 and R.sub.2 is hydrogen and the other is hydroxy or lower alkanoyloxy with the proviso that when R.sub.1 is hydroxy or lower alkanoyloxy, the 2-3 double bond has a cis configuration and when R.sub.1 is hydrogen, the 2-3 double bond has a trans configuration and n is an integer of from 0 to 1.
Dependencies are inferred from the claim text.