PROCESS FOR THE PREPARATION OF DULOXETINE AND FOR THEIR THE INTERMEDIATES

The present invention relates to a process for the preparation of duloxetin. ((S)-(+)-N-methyl-N-(3-(l-na?hthalenyloxy)-3-(2-thienyl)propanamine) of formula (I) and pharmaceutically acceptable salts thereof, said process comprising the steps of a) resolving racemic 3-(N-methyl-N-berizylamino)-1-(2-t...

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Main Authors TEMESVARI KRISZTINA, FOGASSY ELEMER DR, SCHINDLER JOZSEF, BODI JOZSEF DR, SZOEKE KATALIN, VUKICS KRISZTINA, GATI TAMAS DR, ELES JANOS DR, FARAGO JANOS
Format Patent
LanguageEnglish
Published 30.01.2012
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
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Summary:The present invention relates to a process for the preparation of duloxetin. ((S)-(+)-N-methyl-N-(3-(l-na?hthalenyloxy)-3-(2-thienyl)propanamine) of formula (I) and pharmaceutically acceptable salts thereof, said process comprising the steps of a) resolving racemic 3-(N-methyl-N-berizylamino)-1-(2-thienyl)-1-propanol of formula (II) with a D-phenylglycine derivative to obtain a compound of formula (IV); and b) reacting (S)-3-(N-methyl-N-ben2yIamino)-1-(2-thienyl)-1-propanol of formula (IV) with 1-fluoronaphthalene to yield (S)-N-methyl-N-benzyl-3-(1-naphthalenyloxy)-3-(2- thienyl)propanamine of formula (V), reacting the compound of formula (V) obtained with 1-chloroethyl chloroformate to yield duloxetin of formula (I), and if desired converting the duloxetin of formula (I) obtained into an acid addition salt thereof.
Bibliography:Application Number: HUP0600946