摘要:
The present invention provides novel isoquinolinium compounds, methods of producing the isoquinolinium compounds, and methods for converting them into cisatracurium, e.g., cisatracurium besylate. The isoquinolinium compounds of the present invention can be obtained in the form of solids, which can be purified using simple techniques and can be used to afford pure cisatracurium besylate without HPLC purification
摘要:
The present invention provides a process for preparing highly pure 4-amino-1-isobutyl-1H-imidazo[4,5-c]quinoline (imiquimod). The process preferably includes heating 4-chloro-1-isobutyl-1H-imidazo[4,5-c]quinoline of formula (II) with ammonia in a polar aprotic solvent at relatively moderate pressure to produce imiquimod, and optionally purifying the imiquimod. The process of the present invention can produce highly pure imiquimod in high yield.
摘要:
The present invention provides a crystalline donepezil maleate, which is used as an intermediate in the preparation of donepezil hydrochloride. Also provided are novel processes for producing same in substantially pure form and a process for producing pharmaceutically pure amorphous donepezil hydrochloride therefrom.
摘要:
An amorphous form of montelukast sodium and a montelukast sodium lactose co-precipitate, processes for producing same, pharmaceutical compositions containing same and methods of treatment utilizing same are disclosed.
摘要:
Provided is a process for producing highly pure 4-amino-1-isobutyl-1H-imidazo[4,5-c]quinoline (imiquimod), which includes reacting 4-chloro-1-isobutyl-1H-imidazo[4,5-c]quinoline with a non-gaseous amine precursor. Also provided are methods for isolating highly pure imiquimod. Further provided are intermediates useful in the production of imiquimod, methods for producing such intermediates, and methods for obtaining imiquimod from such intermediates.
摘要:
The present invention relates to an improved process of alkylating secondary amines, more particularly of alkylating compounds having amino piperidinic group, which are useful as donepezil intermediates, wherein an alcohol serves as reaction facilitator thus enabling to obtain donepezil and salts thereof in high quality and yield. The present invention also relates to the prevention of unwanted alkylation of donepezil precursors, having amino piperidinic group, by using suitable reaction conditions.
摘要:
Novel crystalline forms of Donepezil base, processes for producing same, pharmaceutical compositions containing same and methods of treatment utilizing same are disclosed.
摘要:
An amorphous form of montelukast sodium and a montelukast sodium lactose co-precipitate, processes for producing same, pharmaceutical compositions containing same and methods of treatment utilizing same are disclosed.
摘要:
The invention provides a stable and easy to formulate amorphous solid, suitable for the preparation of solid pharmaceutical compositions comprising a mixture of an amorphous active pharmaceutical ingredient and at least one pharmaceutically acceptable inactive ingredient.
摘要:
The invention provides a process for the preparation of a compound of the formula 6 comprising the hydrolysis and decarboxylation of a compound of the formula 5 according to the reaction: wherein R and R2 independently a C1-C4 alkyl group or an aralkyl group.