166883-20-1Relevant articles and documents
Efficient syntheses of AZD4407 via thioether formation by nucleophilic attack of organometallic species on sulphur
Alcaraz, Marie-Lyne,Atkinson, Stephanie,Cornwall, Philip,Foster, Alison C.,Gill, Duncan M.,Humphries, Lesley A.,Keegan, Philip S.,Kemp, Richard,Merifield, Eric,Nixon, Robert A.,Noble, Allison J.,O'Beirne, Darren,Patel, Zakariya M.,Perkins, Jacob,Rowan, Paul,Sadler, Paul,Singleton, John T.,Tornos, James,Watts, Andrew J.,Woodland, Ian A.
, p. 555 - 569 (2012/12/25)
The development of two efficient strategies for the synthesis of AZD4407 is reported, both of which are considered suitable for large-scale manufacture. In the first approach, 3-bromothiophene is coupled with (2S)-2- methyltetrahydropyran-4-one using Grignard chemistry. Following hydroxyl protection and lithiation at thiophene C-2, reaction with a protected 5-mercapto-1-methyl-1,3-dihydro-indol-2-one derivative bearing a leaving group on sulphur provides AZD4407 after acid-catalysed deprotection and epimerisation. The second approach starts from 2,4-dibromothiophene, which undergoes a selective Grignard exchange reaction at C-2 followed by reaction with similar protected mercapto-oxindole derivatives. Reprotection of the oxindole ring, followed by a second Grignard exchange, and reaction with (2S)-2- methyltetrahydropyran-4-one provides AZD4407 after acid-catalysed deprotection and epimerisation.
ETHER DERIVATIVES HAVING 5-LIPOXYGENASE INHIBITORY ACTIVITY
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, (2008/06/13)
The invention concerns ether derivatives of the formula I Q1?X?Ar?Q2 wherein Q1 is an optionally substituted 9-, 10- or 11-membered bicyclic heterocyclic moiety containing one or two nitrogen heteroatoms and optionally containing a further heteroatom selected from nitrogen, oxygen and sulphur; X is oxy, thio, sulphinyl or sulphonyl; Ar is optionally substituted phenylene, pyridinediyl, pyrimidinediyl, thiophenediyl, furandiyl, thiazolediyl, oxazoiediyl, thiadiazoiediyl or oxadiazolediyl; and Q2 is selected from the groups of the formulae II and III: wherein R1 is hydrogen, (2-5C)alkanoyl or optionally substituted benzoyl; R2 is (l-4C)alkyl; and R3 is hydrogen or (l-4C)alkyl; or R2 and R3 are linked to form a methylene, vinylene, ethylene or trimethylene group; or a pharmaceutically-acceptable salt thereof; processes for their preparation; pharmaceutical compositions containing them and their use as 5-lipoxygenase inhibitors.