Process for the preparation of montelukast, and intermediates therefor
申请人:Pathi Srinivas Laxminarayan
公开号:US20100081688A1
公开(公告)日:2010-04-01
The invention relates to processes for making montelukast and to intermediates for use in the process, in particular compounds of formulas 2-7: L=OAc, OTs, OTf5OMs; where X=Cl, Br, I.
A process for preparation of montelukast or a salt thereof is provided, the process including reacting a late intermediate compound which is 2-[1-[1-R-3-[2-(7 chloro quinolin-2-yl)vinyl [phenyl]-3-[2-methoxy carbonyl phenyl]propyl sulfonyl methyl]cyclo propyl]acetic acid or a salt thereof with methyl magnesium chloride or methyl magnesium bromide in an organic solvent. In one embodiment, the process includes reacting an earlier intermediate compound which is methyl 2-(3-R-(3-(2-(7-chloro 2-quinolinyl)-ethenyl)-3 hydroxy propyl)benzoate with methane sulfonyl chloride or toluene sulfonyl chloride to obtain a mesylated or tosylated derivative of the earlier intermediate compound; followed by a reaction of the mesylated or tosylated derivative with 1-mercapto methyl cyclopropane acetic acid in a polar solvent in a presence of a base to obtain the late intermediate compound.
Novel polymorphs of montelukast ammonium salts and processes for preparation therefor
申请人:Adin Itai
公开号:US20070213365A1
公开(公告)日:2007-09-13
Novel crystalline forms I, II, III, IV, V, VI, VII, VIII, IX, and X of montelukast ammonium salts are provided, and novel methods of making these forms are disclosed.
MONTELUKAST BENZHYDRYL PIPERAZINE SALTS AND PROCESS FOR PREPARATION THEREOF
申请人:Shimpi Nitin Ashok
公开号:US20100292251A1
公开(公告)日:2010-11-18
The invention relates to Benzhydryl piperazine salts of [R-(E)]-1-[[[1-[3-[2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid represented by the formula (III). Furthermore, the invention relates to the use of Benzhydryl piperazine salts of [R-(E)]-1-[[[1-[3-[2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid represented by the formula (III) for the preparation of substantially pure [R-(E)]-1-[[[1-[3-[2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropane acetic acid or its alkali salts and pharmaceutical composition comprising the same.