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 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 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 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:
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:
A method for resolving optically impure 3-oxa-2-oxobicyclo�3.1.0!hexane-1-carboxylic acid esters. A method is provided for producing a 1-alkoxycarbonyl-2-hydroxymethylcyclopropane-1-carboxylic acid.N-benzyl-.alpha.-phenylethylamine diastereomer salt. An enantiomer of N-benzyl-.alpha.-phenylethylamine is reacted with a 1-alkoxycarbonyl-2-hydroxymethylcyclopropane-1-carboxylic acid to produce a precipitate that is enriched in one diastereomer of the salt. After isolating the optically active salt, the N-benzyl-.alpha.-phenylethylamine may be separated to produce the corresponding 1-alkoxycarbonyl-2-hydroxymethylcyclopropane-1-carboxylic acid. Under acidic conditions, the carboxylic acid and hydroxyl groups undergo ring closure to afford the optically active 3-oxa-2-oxobicyclo�3.1.0!hexane-1-carboxylic acid ester.
摘要:
The present invention provides crystals of phenylalanine derivatives of the formula (I): and particularly α-type, γ-type, ε-type, η-type, and θ-type crystals thereof. These crystals are excellent in preservation stability or moisture resistance. They can also be produced on an industrial scale.
摘要:
The present invention provides crystals of phenylalanine derivatives of the formula (I): and particularly α-type, γ-type, ε-type, η-type, and θ-type crystals thereof. These crystals are excellent in preservation stability or moisture resistance. They can also be produced on an industrial scale.
摘要:
A process for purifying 2-amino-6-chloro-9-[(1′S,2′R)-1′,2′-bis(hydroxymethyl) cycdopropane-1′-yl]methylpurine represented by the following formula (5) comprises the step of selectively isolating 2-amino-6-chloro-9-[(1′S,2′R)-1′,2′-bis(hydroxymethyl) cyclopropane-1′-yl]methylpurine from a mixture of 2-amino-6-chloro-9-[(1′S,2′R)-1′,2′-bis(hydroxymethyl)cyclopropane-1′-yl]methylpurine and 2-amino-6-chloro-7-[(1′S,2′R)-1′,2′-bis(hydroxymethyl)cyclopropane-1′-yl]methylpurine represented by the following formula (6) by the crystallization. This process has a satisfactory medicinal quality on an industrial scale without necessitating complicated operations such as chromatographic purification.
摘要:
The present invention releates to a method for preparing a phenylalanine compound having a quinazoline-dione ring represented by the following formula (1) or a pharmaceutically acceptable salt thereof: where R1-R4 are defined herein. The method involves reacting a specified acyl phenylalanine compound with a carbonyl group-introducing reagent and a specified anthranilic acid compound to form a carboxy-asymmetric urea compound which is converted to a quinazoline-dione compound in the presence of a carboxyl group-activating agent.