摘要:
The present invention relates to a modified physiologically active protein, modified physiologically active proteins produced by the process and pharmaceutical compositions containing the same.
摘要:
Optically active diphenylalanine compounds may be conveniently prepared in a good yield by reacting a diphenylalanine compound represented by formula (1) with an optically active amine compound represented by formula (2) in the presence of an organic solvent to give a diastereomeric salt represented by formula (5) and then treating the diastereomeric salt under acidic conditions to give an optically active diphenylalanine compound represented by formula (3): wherein each symbol is as defined in the specification.
摘要:
The present invention provides a method for producing a phenylalanine derivative(s) having a quinazolinedione ring of formula (5), including steps comprising of reacting an acylphenylalanine derivative(s) of formula (1) with a carbonyl group-introducing reagent(s) and a derivative(s) of anthranilic acid to form an asymmetric urea intermediate(s); making the asymmetric urea intermediate(s) into a quinazolinedione compound(s) of formula (4) in the presence of a base(s); and N-alkylating quinazolinedione ring amide of the obtained quinazolinedione compounds with N-alkylation agents. This production method is an industrially applicable method for producing phenylalanine derivatives having a quinazolinedione skeleton, which are compounds highly useful as drugs having α 4 integrin inhibiting activity. In the formulae (1) and (5), R1 represents a phenyl group having a substituent(s) and the like, R2 represents an alkyl group and the like, R3 represents a dialkylamino group and the like, and R4 represents an alkyl group and the like.
摘要:
The present invention relates to a method of producing a compound represented by the formula [I] or a salt thereof, which comprises reacting a compound represented by the formula [II] or a salt thereof with a compound represented by the formula [III] or a salt thereof, in the presence of a base, in alcohol, and provides a production method of an O-substituted tyrosine compound, which is superior in productivity, versatility and safety, and economically and industrially useful: wherein each symbol is as defined in the specification.
摘要:
A pure (-)-9-[1'S, 2'R-bis(hydroxymethyl)cyclopropan-1'-yl]methylguanine is prepared by:suspending or dissolving a mixture comprising (-)-9-[1'S, 2'R-bis(hydroxymethyl)cyclopropan-1'-yl]methylguanine and (7-[1'S,2'R-bis(hydroxymethyl)cyclopropan-1'-yl]methylguanine in an alcohol or a hydrous alcohol, reacting the resulting suspension or solution with an alkali metal hydroxide or alkoxide, and selectively precipitating crystals of nucleic acid derivatives of formula (I) ##STR1## wherein M represents an alkali metal.
摘要:
The present invention provides a production method including reacting a diphenylmethylene halide compound represented by the following formula (1) with a malonic acid diester compound represented by the following formula (2) in an organic solvent selected from N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone and N,N-dimethylformamide, in the presence of a base selected from an alkali metal hydride and an alkali metal t-butoxide to give a diester compound represented by the following formula (3), and then subjecting the diester compound to hydrolysis and decarboxylation to give a diphenylalanine compound represented by the following formula (4). According to the present invention, diphenylalanine compound (4) can be obtained industrially advantageously in a high yield. wherein each symbol is as defined in the specification.
摘要:
The present invention relates to a method of producing a compound represented by the formula [I] or a salt thereof, which comprises reacting a compound represented by the formula [II] or a salt thereof with a compound represented by the formula [III] or a salt thereof, in the presence of a base, in alcohol, and provides a production method of an O-substituted tyrosine compound, which is superior in productivity, versatility and safety, and economically and industrially useful: wherein each symbol is as defined in the specification.
摘要:
The invention provides a process for producing optically active 2,2-dimethylcyclopropanecarboxylic acid by reacting an optical isomer mixture of 2,2-dimethylcyclopropanecarboxylic acid with an optically inactive amine to form (precipitate, crystallize or the like) an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, for example, optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid. The production (optical resolution, separation of an optically active substance, purification of an optically active substance or the like) of optically active 2,2-dimethylcyclopropanecarboxylic acid which is important as an intermediate for production of agricultural chemicals, medications and the like can easily be conducted at low cost. Further, the invention provides an intermediate therefor (an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, especially preferably an ammonium salt of optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid, or the like), and an optical resolution agent (optically inactive amine) for separation of optically active 2,2-dimethylcyclopropanecarboxylic acid.
摘要:
An industrially suitable process for preparing V-28-3M useful as an antimycotic agent by conducting methyl esterification of V-28-3 efficiently. V-28-2 is efficiently converted into V-28-3M by protecting the amino group of the amino sugar of V-28-3 with an appropriate protecting group, subjecting the carboxyl group of V-28-3 to methyl esterification with methyl methanesulfonate or methyl p-toluenesulfonate in the presence of a base, and deprotecting the N-protected intermediate.
摘要:
There is disclosed a process for asymmetrically reducing a carbonyl compound, which comprises reducing the carbonyl compound by the use of a reducing agent comprising (i) an optically active tartaric acid or ester thereof and (ii) a metal borohydride, thereby producing an optically active hydroxyl compound. The process can be used for the production of optically active hydroxyesters and alcohols from ketoesters and ketones. These products are useful for the production of medicaments and liquid crystals.