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US 6,608,220 B1Granted
Conversion of bisnoralcohol to bisnoraldehyde
AssigneePharmacia & Upjohn Company
InventorBradley D. Hewitt
Life of this patent
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Abstract
The present invention is a process for the conversion of bisnoralcohol to bisnoraldehyde (II), which is a known intermediate in the synthesis of progesterone.
Claims18
A process for the production bisnoraldehyde (II)
- which comprises:
- (1) forming a mixture of
- (a) bisnoralcohol (I)
- (b) a catalytic amount of 4hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl in a pH range of about 8.5 to about 10.5 in a temperature range of about −10° to about 15°, and
- (2) contacting the mixture of step (1) with a stoichiometric amount of hypochlorite in the presence of a catalytic amount of bromide.
2 more elements
Dependencies are inferred from the claim text.