摘要:
Racemic tamsulosin free base is obtained in solid form. The solid form can be formed by precipitating racemic tamsulosin free base from a solvent that comprises at least one of water or a lower alcohol. The crystalline free base exhibits polymorphism and two unique forms are identified. Novel intermediates are disclosed useful in the production of tamsulosin free base: a sulfonic acid salt of 2-(o-ethoxyphenoxy)ethylamine and (3-aminosulfonyl-4-methoxy)phenylacetone.
摘要:
The invention relates to a compound or composition comprising N-formyl paroxetine of formula (1) and 0 to 99.97% of a paroxetine compound, based on the combined weight of said N-formyl paroxetine and said paroxetine compound, to a pharmaceutical composition, for treating a selective serotonin reuptake inhibitor-treatable disease or condition, comprising an effective amount of a paroxetine agent and at least one pharmaceutically acceptable excipient, wherein said paroxetine agent comprises of an N-formyl paroxetine compound of formula (1) and optionally a paroxetine compound, and to a process for producing a paroxetine compound which comprises treating an N-formyl paroxetine compound of formula (1) with a de-formylation agent, to a compound having the formula (2), to a process for determining the stability or purity of a paroxetine substance or composition, which comprises assaying a paroxetine substance or composition for the presence of an N-formyl paroxetine compound of formula (1), and to a process assaying the quality of paroxetine, which comprises forming a production lot of paroxetine pharmaceutical solid dosage forms wherein each dosage form comprises paroxetine or a pharmaceutically acceptable salt thereof and at least one pharmaceutically acceptable exipient; removing a sample of said paroxetine pharmaceutical solid dosage forms from said production lot; assaying said sample for the presence and/or amount of N-formyl paroxetine; and selling or releasing said production lot if said sample passes said assay with respect to the presence or amount of N-formyl paroxetine.
摘要:
A new process to obtain pramipexole and related products is described. The process involves the reaction of new compounds of formula (6), wherein R is hydrogen or acyl group, R3 and R4 are either the same and each of them represents an alkoxy group of 1-4 carbons or they together form a C2-C5 alkylenedioxy group or an oxo-group, with an alkylamine in the presence of a reducing agent or a hydrogen gas with hydrogenation catalyst. A process to obtain new compounds of formula (6) is also described.
摘要:
The present invention is based on the discovery that additional forms of amlodipine besylate exist beyond the single known form of the prior art. The invention also relates to anovel process for making various amlodipine besylate form. The novel amlodipine besylate forms include crystalline hydrates and anhydrates as wellas amorphous forms.
摘要:
A new process to obtain pramipexole and related products is described. The process involves the reaction of new compounds of formula (6), wherein R is hydrogen or acyl group, R3 and R4 are either the same and each of them represents an alkoxy group of 1-4 carbons or they together form a C2-C5 alkylenedioxy group or an oxo-group, with an alkylamine in the presence of a reducing agent or a hydrogen gas with hydrogenation catalyst. A process to obtain new compounds of formula (6) is also described.
摘要:
Racemic tamsulosin free base is obtained in solid form. The solid form can be formed by precipitating racemic tamsulosin free base from a solvent that comprises at least one of water or a lower alcohol. The crystalline free base exhibits polymorphism and two unique forms are identified. Novel intermediates are disclosed useful in the production of tamsulosin free base: a sulfonic acid salt of 2-(o-ethoxyphenoxy)ethylamine and (3-aminosulfonyl-4-methoxy)phenylacetone.
摘要:
Optically impure tamsulosin including racemic tamsulosin can be resolved into optically pure (R)- or (S)-tamsulosin by the use of diastereomeric sulfonate salts of tamsulosin in a fractional crystallization technique.
摘要:
The invention relates to a compound or composition comprising N-formyl paroxetine of formula (1) and 0 to 99.97% of a paroxetine compound, based on the combined weight of said N-formyl paroxetine and said paroxetine compound, to a pharmaceutical composition, for treating a selective serotonin reuptake inhibitor-treatable disease or condition, comprising an effective amount of a paroxetine agent and at least one pharmaceutically acceptable excipient, wherein said paroxetine agent comprises of an N-formyl paroxetine compound of formula (1) and optionally a paroxetine compound, and to a process for producing a paroxetine compound which comprises treating an N-formyl paroxetine compound of formula (1) with a de-formylation agent, to a compound having the formula (2), to a process for determining the stability or purity of a paroxetine substance or composition, which comprises assaying a paroxetine substance or composition for the presence of an N-formyl paroxetine compound of formula (1), and to a process assaying the quality of paroxetine, which comprises forming a production lot of paroxetine pharmaceutical solid dosage forms wherein each dosage form comprises paroxetine or a pharmaceutically acceptable salt thereof and at least one pharmaceutically acceptable exipient; removing a sample of said paroxetine pharmaceutical solid dosage forms from said production lot; assaying said sample for the presence and/or amount of N-formyl paroxetine; and selling or releasing said production lot if said sample passes said assay with respect to the presence or amount of N-formyl paroxetine.
摘要:
Aryl-2-piperidones of formula (7) can be reduced to form aryl-piperidine carbinols of formula (1), which are useful in forming a variety of pharmaceutical compounds including paroxetine, in good yield and purity. Related compounds and synthesis schemes are also set forth. In said formulas, X represents a hydrogen atom, a halogen atom, a lower alkyl group, an aralkyl group, an alkoxy group, a dialkylamino group or an alkylthio group; R represents a hydrogen atom, a lower alkyl group, an aryl group, an aralkyl group, an alkoxycarbonyl group, aralkoxycarbonyl group or an aryloxycarbonyl group; and R1 represents a hydrogen atom, a lower alkyl group, an aryl group or an aralkyl group.