The present invention provides a synthetic process for the N-demethylation of N-methyl morphinans. In particular, the invention provides improved synthetic methods for the preparation of N-demethylated morphinan compounds that may be employed as starting materials, for example, commonly available N-methyl opiates such as oripavine and thebaine, and C(3)-protected hydroxy derivatives of oripavine.
The present invention provides an efficient process for preparing N-alkylated opiates. In particular, processes are provided for using a chloride-containing alkylating agent and a bromide or iodide salt to alkylate the corresponding nor-opiate.
The invention provides processes for the preparation of morphinans having a tertiary amine. In particular, the present invention provides processes for the formation of tertiary amine alkaloids by direct N-alkylation of secondary amine alkaloids, the processes co-mediated by an alkylating agent and a protic solvent or a mixture of a protic solvent and an aprotic solvent.
Remove Amination of 6-Keto Normorphinans by Catalytic Hydrogen Transfer
申请人:Grote Christopher W.
公开号:US20100317861A1
公开(公告)日:2010-12-16
The present invention provides processes for the stereoselective synthesis of 6-alpha-amino morphinans. In particular, the invention provides processes for the reductive amination of 6-keto normorphinans by catalytic transfer hydrogenation.
Processes for the preparation of normorphinan salts
申请人:Wang Peter X.
公开号:US20090156819A1
公开(公告)日:2009-06-18
The invention provides a process for the conversion of opioid derivatives into normorphinan compounds useful for making “nal” compound analgesics and antagonists. In particular, the process may be used for the production of pure normorphinan salts from crude opioid substrates.