摘要:
Process for the preparation of aryl or vinyl carboxylic acids via Pd-catalysed hydroxycarbonylation of aryl and vinyl bromides, wherein the aryl or vinyl bromides are reacted with a carbon monoxide source comprising lithium formate and acetic acid anhydride, in the presence of the combination of palladium complexes with the chelating ligand dppf (1,1-bis[diphenylphosphino]ferrocene).
摘要:
Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung von 3-Alkoxy-2-methylbenzoesäuren durch Erhitzen von substituierten Naphthalinen in Gegenwart von Alkalimetallhydroxiden und anschließender Alkylierung.
摘要:
The invention relates to a method for oxidising an aromatic aldehyde into the corresponding carboxylic acid. According to the invention, the method of preparing an aromatic acid by oxidation of an aromatic aldehyde consists in performing the oxidation in a basic medium of an aromatic aldehyde, using molecular oxygen or a gas containing same, in the presence of a catalyst. Said preparation method is characterised in that the oxidation is performed in the presence of an effective quantity of a palladium- and/or platinum-based catalyst in conditions such that the oxidation takes place in the diffusion regime.
摘要:
Process for the preparation of ethers of hydroxybenzoic acid having general formula (I), which comprises reacting a hydroxybenzoic acid, optionally substituted, with a halide XR1, wherein X is a halogen such as chlorine, in a basic environment and in an aqueous or aqueous/organic biphasic solvent.
摘要:
A process for producing trifluoroethoxyarenecarboxylic acids or salts thereof by reaction of haloarenecarboxylic acids or salts thereof with 2,2,2-trifluoroethanol in the presence of a strong base and copper containing materials. The compounds obtained by the process of the present invention are used as synthetic intermediates in the pharmaceutical industry.
摘要:
A compound of structure (I), wherein, when R8 = H: R1 = alkyl, cycloalkyl, arylalkyl, aryl; R2 = cycloalkyl, aryl, C3-C10 alkyl; X, Y = O, S(O)n, NH; Z = CH2OH, NHSO2R3, CHO, CO2R3, CONHR4R5, CN, COR6, H, halo, NHCN, NHCONR4R5, CONR4OR5, CONR4NR5R6, 1-tetrazole, S(O)nOH, S(O)nNR3R4, C=NOH, C(=N(OH)NH2, OCONR7R6, P(O)(OR4)2, NH2, SH, OH, OS(O)2R3, C(O)CO2R3, C(O)CONR3R4, CH(OH)CO2R3, CHFCO2R3, CF2CO2R3, CH(OH)CONR3R4, CF2CONR3R4, C=NNH2, C(=NOC(=O)R3)R4, C(=NNHC(=O)R3)R4, C(=NOH)R3, C(=NNR3)R4, NHC(=O)R6 or C(O)CONH2; R3, R4, R5, R6, R7 = hydrogen, alkyl, aryl, aryalkyl, cycloalkyl, or fluoroalkyl; or a compound of Structure I, wherein: R1 = alkyl, cycloalkyl, aryalkyl, or aryl; R2 = cycloalkyl, aryl, or alkyl; X, Y = CH2, O, S(O)n), or NH; R3, R4, R5, R6, R7 are each, independently, hydrogen, alkyl, aryl, aryalkyl, cycloalkyl, or fluoroalkyl; R8 = CO2R3, CONR3, or R8 and Z are concatenated such that R8Z = C(O)NHNHC(O), (CH2)mC(=W), V(CH2)mC(=W), or VnCH=CH(CH2)nC(=W); where V = O, S(O)n, NH; W = O, NOH, NHNH2, NOC(O)CH3, or NNHC(O)CH3; halo = Cl, Br, or I; fluoroalkyl = CF3CHF2, CH2F, CH2CF3, C2F5; cycloalkyl = C3-C6 cycloalkyl; aryalkyl = C1-C4 aryl; aryl = phenyl, furanyl, thienyl, or pyridyl; n = 0-2; and m = 2-4 or pharmaceutically acceptable salts thereof, useful in the treatment of asthma, or allergic or inflammatory diseases, as well as methods of treatment and pharmaceutical compositions utilizing the same.