摘要:
A process for the preparation of 4-trifluoromethylvalerophenone is described. The process described is a three step process comprising the synthesis of organomagnesium specie, coupling reaction between the organomagnesium specie and trifluoromethylbenzonitrile or trifluoromethylbenzoyl chloride and preferably a purification of the product obtained in suitable reaction conditions. In the process an extraction phase of the final product is not required.
摘要:
A process for the preparation of citalopram of formula (I) in which a compound of formula (II) wherein Z is iodo, bromo, chloro or CF3—(CF2)n—SO2—O— n being 0, 1, 2, 3, 4, 5, 6, 7 or 8, is subjected to a cyanide exchange reaction in which the group Z is exchanged with cyanide by reaction with a cyanide source; the resultant crude citalopram product is optionally subjected to some initial purification and the crude citalopram base is subsequently subjected to a film distillation process; the resulting citalopram product is then optionally further purified and worked up and isolated as the base or a pharmaceutically acceptable salt thereof.
摘要:
A process for preparing 1-(6-methylpyridin-3-yl)-2-[4-(methyl sulfonyl)phenyl]ethanone, an intermediate of the synthesis of Etoricoxib. The synthesis of the intermediates useful for such preparation is also described.
摘要:
The present invention relates to a process for the synthesis of Moxifloxacin of Formula (I) and salts thereof by means of a process providing the coupling reaction of 1-cyclopropril-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinic acid or ester thereof with (4aS, 7aS)-octahydro-1H-pyrrole[3,4-b]pyridine using a magnesium salt.
摘要:
The present invention refers to the synthesis of 3-{[(2R)-1-methylpyrrolidin-2-yl]methyl}-5-[2-(phenylsulfonyl)ethyl]-1H-indole, a drug known by the name Eletriptan, or of its salts. In particular, the present invention regards a process for the synthesis of Eletriptan or of its salt, comprising the following steps: a) Salifying the intermediate of Formula (6), using a dicarboxylic acid to obtain a derived salt; b) Optionally, purifying said raw salt obtained according to step a) by solvent crystallization to obtain a purified salt of the intermediate of Formula (6); c) Converting said salt of the intermediate of formula (6) according to step a) or said purified salt according to step b) into an intermediate of formula (10); d) Converting the intermediate of Formula (10) into Eletriptan or its salt.
摘要:
Methods for manufacture of 5-alkoxycarbonylphthtalides are disclosed. The 5-alkoxycarbonylphthtalides are useful in syntheses of the well-known antidepresssants citalopram and escitalopram.
摘要:
A process for the preparation of ziprasidone and a novel intermediate useful in its preparation. The process comprises the reduction of a compound (III) to give a compound (V) which is then reduced to compound (II). This is reacted with compound (IV) to give the desired compound.
摘要:
The present invention refers to a process for the preparation of 4H-imidazo[1,5-a][1,4]benzodiazepines, in particular Midazolam, through an efficient and selective decarboxylation reaction of the derivative compound of the 5-aminomethyl-1-phenyl-1H-imidazole-4-carboxylic acid of formula (II) avoiding the formation of the 6H-imidazo[1,5-a][1,4]benzodiazepines by-products and the ensuing process for the isomerization of a 4H-imidazo[1,5-a][1,4]benzodiazepine product.
摘要:
The present invention relates to a process for the preparation of Brinzolamide, or 2H-thieno[3,2-e]-1,2-thiazin-6-sulfonamide, 4-(ethyl amino)-3,4-dihydro-2-(3-methoxypropyl)-, 1,1-dioxide, (4R)-via intermediates 2,3-dihydro-4H-thieno[3,2-e]-1,2-thiazin-4-ones, 1,1-dioxide. Further objects of the present invention are the intermediates mentioned above and other intermediates of the synthesis.
摘要:
The present invention relates to a process for the synthesis of Moxifloxacin of Formula (I) and salts thereof by means of a process providing the coupling reaction of 1-cyclopropril-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo -3-quinolinic acid or ester thereof with (4aS, 7aS) -octahydro-1H-pyrrole[3,4-b]pyridine using a magnesium salt.