Compositions and methods for lightening and/or depigmenting skin are provided, the compositions comprising compounds having the structure:
or having the structure:
as defined herein.
Provided is a preparation method for revaprazan hydrochloride, the method comprising: (1) the preparation of 4-hydroxyl-2-(4-fluoroaniline)-5,6-dimethylpyrimidine; (2) the preparation of 4-chloro-2-(4-fluoroaniline)-5,6-dimethylpyrimidine; (3) the preparation of revaprazan hydrochloride. The method has advantages such as simple operations, high product purity, good yield and suitability for industrial production.
[EN] IMPROVED PROCESS FOR PREPARATION OF REVAPRAZAN HYDROCHLORIDE<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION DE CHLORHYDRATE DE RÉVAPRAZAN
申请人:LUPIN LTD
公开号:WO2014060908A1
公开(公告)日:2014-04-24
The present invention provides improved process for preparation of revaprazan hydrochloride (I) comprising reaction of l-methyl-l,2,3,4-tetrahydroisoquinoline (III) withcompound (VII) wherein R is a good leaving group selected from F, Cl, Br, I, (1), (2), (3) in presence of phase transfer catalyst and solvent to give revaprazan (VI) and followed by treatment with hydrochloride acid.
The present invention is directed to an electrospun pharmaceutical composition comprising a pharmaceutically acceptable actibe agent, and a pharmaceutically acceptable polymeric carrier for use in therapy.