[EN] PROCESS FOR PREPARATION OF (DL) -NOREPINEPHRINE ACID ADDITION SALT, A KEY INTERMEDIATE OF (R) - (-) - NOREPINEPHRINE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN SEL D'ADDITION D'ACIDE DE NORÉPINÉPHRINE (DL), INTERMÉDIAIRE CLÉ DE LA NORÉPINÉPHRINE (R) - (-) -
申请人:NEON LAB LTD
公开号:WO2013008247A1
公开(公告)日:2013-01-17
The invention discloses a process for preparation of (dl)-norepinephrine salt by reacting 3,4-dihydroxy-a-haloacetophenone with hexamethylenetetramine to provide hexamine salt; followed by hydrolysis and hydrogenation. The invention also discloses a novel intermediate formed in the process and its synthesis.
A process for producing a urethane compound which comprises reacting at least one compound selected from the group consisting of a primary amine, a secondary amine and a urea compound with carbon monoxide and an organic hydroxyl compound in the presence of a catalyst system comprising:
(a) at least one member selected from the group consisting of platinum group metals and compounds containing at least one platinum group element; and
(b) at least one halogen-containing compound selected from the group consisting of alkali or alkaline earth metal halides, onium halides, compounds capable of forming onium halides in the reaction, oxo acids of halogen atoms and their salts, complex compounds containing halogen ions, organic halides and halogen molecules,
in the presence of molecular oxygen and/or an organic nitro compound as an oxidizing agent at a temperature of from about 80°C to about 300°C under a pressure of from about 1 Kg/cm2 to about 500 Kg/cm2.
Process for the preparation of l-Norepinephrine bitartrate monohydrate having high enantiomeric purity
申请人:HARMAN FINOCHEM LIMITED
公开号:US10865180B2
公开(公告)日:2020-12-15
The present invention, discloses optically pure compounds of l-Norepinephrine and its acid addition salts and hydrates and process for the preparation thereof. Specifically, the present invention discloses optically pure compounds of l-Norepinephrine bitartrate, its process of preparation and pharmaceutical compositions comprising the same.
KANTLEHNER, W.;MAIER, T.;LOEFFLER, W.;KAPASSAKALIDIS, J. J., LIEBIGS ANN. CHEM., 1982, N 3, 507-529
作者:KANTLEHNER, W.、MAIER, T.、LOEFFLER, W.、KAPASSAKALIDIS, J. J.
DOI:——
日期:——
PROCESS FOR THE PREPARATION OF l-NOREPINEPHRINE BITARTRATE MONOHYDRATE HAVING HIGH ENANTIOMERIC PURITY
申请人:HARMAN FINOCHEM LIMITED
公开号:US20200048185A1
公开(公告)日:2020-02-13
The present invention, discloses optically pure compounds of l-Norepinephrine and its acid addition salts and hydrates and process for the preparation thereof. Specifically, the present invention discloses optically pure compounds of l-Norepinephrine bitartrate, its process of preparation and pharmaceutical compositions comprising the same.