摘要:
A process for the preparation of 4-[1-oxo-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-α,α-dimethylbenzeneacetic acid, useful as an intermediate in the preparation of fexofenadine.
摘要:
A process for the preparation of 2-(4-methylphenyl)benzoic acid C1-6alkyl esters by reaction of a sulfonic derivative of formula wherein R is C1-6alkyl and R1 is optionally perfluorinated C1-6alkyl or optionally substituted C1-6aryl, with a 4-methylphenylzinc halide.
摘要:
A process for obtaining nitroxyalklesters of the 2(S)(6-methoxy-2-naphthyl)-propanoic acid having an enantiomeric excess higher than or equal to 95%, preferably higher than or equal to 98%, characterized in that an halide of the 2-(S)-(6 methoxy-2-naphthyl)propanoic acid of formula A-Hal, wherein A is the acid acyl residue, is reacted in an inert orgariic solvent with an aliphatic nitroxyalkanol HO—Y—ONO2, wherein Y is a C2-C20 alkylene or a cycloalkylene from 3 to 8 carbon atoms, or an alkylene as defined containing a cycloalkylene as defined, in the presence of an inorganic base.
摘要:
A process for the preparation of terbinafine, comprising the reaction of a compound of formula (II), or a salt thereof, wherein X is a leaving group, with tert-butylacetylene, in the presence of a platinum catalyst.
摘要:
A process for the preparation of terbinafine, comprising the reaction of a compound of formula (II), or a salt thereof, wherein X is a leaving group, with tert-butylacetylene, in the presence of a platinum catalyst
摘要:
A process for obtaining nitroxyalklesters of the 2(S)(6-methoxy-2-naphthyl)-propanoic acid having an enantiomeric excess higher than or equal to 95%, preferably higher than or equal to 98%, characterized in that an halide of the 2-(S)-(6 methoxy-2-naphthyl)propanoic acid of formula A-Hal, wherein A is the acid acyl residue, is reacted in an inert organic solvent with an aliphatic nitroxyalkanol HO—Y—ONO2, wherein Y is a C2-C20 alkylene or a cycloalkylene from 3 to 8 carbon atoms, or an alkylene as defined containing a cycloalkylene as defined, in the presence of an inorganic base.
摘要:
A process for the preparation of 2-[(diphenylmethyl)sulfinyl]acetamide (I) comprising the oxidation of sodium 2-[(diphenylmethyl)sulfenyl]acetate to the corresponding sulfoxide and the derivatization of the latter to amide
摘要:
A process for obtaining nitroxyalkylesters of the 2-(S)-(6-methoxy-2-naphthyl)-propanoic acid having an enantiomeric excess higher than or equal to 95%, preferably higher than or equal to 98%, characterized in that an halide of the 2-(S)-(6-methoxy-2-naphthyl)-propanoic acid of formula A-Hal, wherein A is the acid acyl residue, is reacted in an inert organic solvent with an aliphatic nitroxyalkanol HO—Y—ONO2, wherein Y is a C2-C20 alkylene or a cycloalkylene from 3 to 8 carbon atoms, or an alkylene as defined containing a cycloalkylene as defined, in the presence of an inorganic base.
摘要:
A process for the preparation of 2,2-dimethyl-5-(2,5-xylyloxy)-valeric acid, which process comprises the reaction of 2,5-dimethylphenol with a compound of formula (II), ##STR1## wherein R is an alkyl, aryl, arylalkyl group and --X is a halogen atom, and the subsequent hydrolysis to compound (I), characterized in that the reaction of compound (II) with 2,5-dimethylphenol is carried out in the absence of solvents and in the presence of an ammonium or quaternary phosphonium salt.