Process for producing 3-[4-(1,1-dimethyl-propyl)-phenyl]2-methyl-propionaldehyde and cis-4{3-[4-(1,1-dimethyl-propyl)-phenyl]2-methyl-propyl}-2,6-dimethyl-morpholine (amorolfine)
申请人:Galderma S.A.
公开号:EP1842848A1
公开(公告)日:2007-10-10
The present invention discloses a new process for the preparation of 3-[4-(1,1-dimethyl-propyl)-phenyl]-2-methyl-propionaldehyde and for the preparation of cis-4-3-[4-(1,1-dimethyl-propyl)-phenyl]-2-methyl-propyl}-2,6-dimethyl-morpholine (Amorolfine).
PROCESS FOR THE PURIFICATION OF AMOROLFINE HYDROCHLORIDE
申请人:Angeli Roberto
公开号:US20110301346A1
公开(公告)日:2011-12-08
The present invention relates to a process for the purification of amorolfine hydrochloride by means of a reversed-phase preparative high performances liquid chromatography (prep-HPLC) said method starting from a crude Amorolfine hydrochloride having purity higher than 90% and containing Bepromoline hydrochloride <5% and Fenpropimorf <3%. The process involves the use of a mobile phase comprising water and an organic solvent under isocratic conditions.
The present invention refers to a process of manufacturing a compound of formula (Ia):
said process comprising:
(i) contacting a compound of formula (III):
with a compound of formula (IV):
in the presence of a palladium catalyst, methanol and hydrogen gas,
said step (i) being conducted preferably under basic conditions with acetic acid added once the consumption of the hydrogen gas has ceased.
A process for the preparation of a compound of formula (Ia):
includes: (i) contacting a compound of formula (III):
with a compound of formula (IV):
in the presence of a palladium catalyst, methanol and hydrogen gas, the step (i) preferably being conducted under basic conditions with acetic acid being added to the medium of reaction once the consumption of the hydrogen gas has ceased.
An improved process of producing Amorolfine base, which is a compound of formula (I):
said process including the steps of:
(i) contacting a compound of formula (II):
with a Friedel-Crafts catalyst at a temperature in the range of 20° to 30° C.;
(ii) adding a 2-halogeno-2-methylbutane thereto, and wherein the reaction mixture obtained in step (i) is cooled to a temperature of from −40° to −60° C. prior to step (ii).