[EN] NOVEL PROCESS FOR THE PREPARATION OF FEBUXOSTAT<br/>[FR] NOUVEAU PROCÉDÉ POUR LA PRÉPARATION DE FEBUXOSTAT
申请人:INDOCO REMEDIES LTD
公开号:WO2012073259A1
公开(公告)日:2012-06-07
Disclosed herein is a novel process for the preparation of 2-[3-cyano-4-(2- methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid and novel intermediates thereof.
Process for the preparation of 2-thio penem derivatives and intermediates therefor
申请人:BEECHAM GROUP PLC
公开号:EP0046363A1
公开(公告)日:1982-02-24
The present invention provides a process for the preparation of a compound of the formula (IV):
or salt or ester thereof wherein R1 and R2 are independently hydrogen; an organic radical bonded via a carbon atom to the ring carbon atom; a free, etherified or esterified hydroxy or mercapto group; an amino or acylamino group; or together R1 and R2 represent a group = CR5R6 wherein R5 and R6 are the same or different and each represent hydrogen or a hydrocarbon or heterocyclic group optionally substituted with a functional group; and R3 represents an organic radical; which process comprises reacting a compound of the formula (V):
wherein Rx is hydrogen or a blocking group and R4 is an organic radical; with a thiol or reactive derivative thereof. The compounds of the formula (IV) are useful as antibiotics and [β-lactamase inhibitors, as are the compounds of the formula (V). This invention also provides the novel compounds of the formula (V) and certain novel compounds within formula (IV). Their preparation and use are described.
Beta-lactam antibiotics, their preparation and their use in pharmaceutical compositions
申请人:BEECHAM GROUP PLC
公开号:EP0028497A1
公开(公告)日:1981-05-13
The present invention provides the compounds of the formula (II):
and pharmaceutically acceptable salts and esters thereof wherein R3 is a hydrogen atom, a group HO3S- or a group R5CO wherein R5 is C1-6 alkyl, C2-6 alkenyl, aryl, aryl(C1-6)alkyl or aryloxy(C1-6) alkyl; and R4 is an organic group other than methyl bonded to the -CO-NH-moiety via a carbon atom; with the proviso that when R3 is a hydrogen atom or a group R5CO the stereochemical configuration at the a-carbon atom of the C-6 substituent is S, and with the further proviso that when R' is a group HO2S- the hydrogen atoms at C-5 and C-6 are cis. Their use is described as are processes for their preparation. Compounds wherein the R'CO-moiety is replaced by a hydrogen atom are also prepared.
Beta-lactam antibacterial compounds, their preparation and pharmaceutical compositions containing them
申请人:BEECHAM GROUP PLC
公开号:EP0034443A2
公开(公告)日:1981-08-26
The present invention provides the compounds of the formula (II):
and pharmaceutically acceptable salts and cleavable esters thereof wherein RCONH is an organic acylamino group and E is a carboxy group or pharmaceutically acceptable salt or ester thereof or is a cyano group. Their preparation is described as is their use in compositions containing them. Compounds wherein RCONH is replaced by an azido group are described as useful intermediates.
A 1-aza(3.2.0]bicycloheptan-2-carboxylic acid or salt or ester thereof having a substituent at position 7 of the formula:
wherein R1 and R2 are independently hydrogen, halogen or an organic group.