摘要:
A method is disclosed for the preparation of optically pure isomes of formeterol, especially the (R,R)- and (S,S)-isomer, by the reaction of an optically pure 4-benzyloxy-3-formamidostyrene oxide with an optically pure 4-methoxy- alpha -methyl-N-(phenylmethyl)benzeneethanamine followed by debenzylation. Useful intermediates in the process are also disclosed, as is the novel L-tartrate salt of R,R-formoterol.
摘要:
A process for preparing an alkyl phenylglycolic acid is disclosed. It follows the sequence of condensing a substituted acetaldehyde with mandelic acid to provide a 5-phenyl-1,3-dioxolan-4-one, which is condensed with an alkyl ketone or aldehyde to provide a 5-(1-hydroxyalkyl)-5-phenyl-1,3-dioxolan-4-one, which is dehydrated to a 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one. The 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one may be hydrolyzed and reduced to an α-alkylphenylglycolic acid or the hydrolysis and reduction steps may be reversed. The process enables the production of single enantiomers of cyclohexylphenylglycolic acid (CHPGA). An analogous process for racemic CHPGA is disclosed employing racemic mandelic acid and acetone. Novel intermediates in the process are also disclosed.
摘要:
A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl (S,R)-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and to their use for the treatment of fungal infection are also disclosed.
摘要:
A substantially pure single enantiomer of a compound of formula (1), wherein X?1 and X2¿ are independently chlorine or fluorine and R is hydrogen, -P(O)(OH)¿2? or -SO3H, or a salt thereof. A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl (R,S)-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and their use for the treatment of fungal infection are also disclosed.
摘要:
A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl R,R-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and their use for the treatment of fungal infection are also disclosed.
摘要:
The invention relates to methods of resolving racemic amlodipine into enantiomerically enriched compositions by precipation with tartaric acid in the presence of a non-aqueous solvent, such as N,N'-dimethylacetamide. The molar ratio of tartaric acid:amlodipine is preferably less than 0.25:1.0 greater than 0.75:1.0.
摘要:
This invention relates to novel compositions of matter containing enantiomerically enriched (-)-desmethylcitalopram, (+)-didesmethylcitalopram, or (-)-didesmethylcitalopram or mixtures thereof in optimal ratios. Contrary to prior teachings, the enantiomerically enriched citalopram metabolites disclosed herein possess potent serotonin reuptake inhibitory activity, with minimal inhibitory effects on the reuptake of other known monoamines, e.g., norepinephrine (NE) or dopamine (DA). The present invention also discloses methods for treating disorders, dysfunctions and diseases for which inhibition of serotonin reuptake is therapeutically beneficial. In particular, the present invention discloses a method for treating various forms of depression with pharmaceutical compositions described herein.
摘要:
A method of preparation of a highly pure salt of R,R-formoterol L-tartrate is disclosed. The process provides the most thermodynamically stable polymorph by recrystallization of a novel polymorph.
摘要:
The invention is directed, in part, to racemic and stereomerically pure 2-hydroxy derivatives of sibutramine and its metabolites, and 2-hydroxy derivatives of desmethylsibutramine and didesmethylsibutramine in particular. The invention is further directed to novel methods of preparing these derivatives are also disclosed. The invention is also directed to pharmaceutical compositions and dosage forms that comprise therapeutically or prophylactically effective amounts of the compounds, optionally in combination with an additional pharmacologically active compound. These pharmaceutical compositions and dosage forms can be used in the methods of the invention, which provide for the treatment or prevention of a variety of diseases and disorders.