Patent · US Active

Preparation of 14-hydroxycodeinone sulfate

US9090620B2 · kind B2 · utility

9Cited by
24References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 21, 2014
Grant dateJul 28, 2015
Priority date
Expiry dateAug 21, 2034

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D489/08
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Synthetic methods are provided for preparation of oxycodone and salts thereof with an improved impurity profile. Thebaine is converted to 14-hydroxycodeinone sulfate intermediate to minimize a 7,8-dihydro-8,14-dihydroxycodeinone impurity. Efficient methods for conversion of oxycodone base to oxycodone hydrochloride are provided to minimize 14-hydroxycodeinone impurity in the final product.

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