摘要:
Modified physiologically active protein which can be produced by reacting a physiologically active protein having a molecular weight falling within the range of from 1 x 10 to 2 x 10 and carrying at least one Gln residue serving as the substitute of transglutaminase with a branched ligand consisting of an amino acid derivative having a lower binding affinity to the asialoglycoprotein receptor located on hepatic parenchymal cells than that to asialoorsomucoid and carrying an amino group and a galactose (Gal) or N-acetylgalactosamine (GalNAc) group serving as the substrate of transglutaminase in the presence of a transglutaminase originating in a microorganism to thereby form an amide bond between the gamma -carboxyamide group of the glutamate residue in the physiologically active protein and the terminal amino group in the branched ligand; and a process for producing the same.
摘要:
A process for producing a phenylalanine derivative which has a quinazolinedione ring and is represented by the formula (5), which comprises reacting an acylphenylalanine derivative represented by the formula (1) with a reagent for carbonyl group introduction and an anthranilic acid derivative to form an asymmetric urea intermediate, converting this asymmetric urea intermediate to a quinazolinedione compound in the presence of a base, and N-alkylating the resultant quinazolinedione compound at the amide group of the quinazolinedione ring with an N-alkylating agent. This process is suitable for the industrial production of the phenylalanine derivative containing a quinazolinedione skeleton, which is a compound highly useful as a medicine having integrin α4 inhibitory activity. In the formulae (1) and (5), R1 represents substituted phenyl, etc.; R2 represents alkyl, etc.; R3 represents dialkylamino, etc.; and R4 represents alkyl, etc.
摘要:
Industrially advantageous processes for preparing 5-substituted-5,11-dihydrodibenz[b,e][1,4]oxazepine derivatives through intramolecular arylation and reduction from [2-(2-bromobenzyloxy)phenyl]amide derivatives bearing via amide linkage substituents to be introduced at the 5-position. More particularly, a process which comprises subjecting (R)-1-[(4-methoxyphenyl)acetyl]pyrrolidine-2-carboxylic [2-(2-bromobenzyloxy)phenyl]amide to intramolecular arylation to form (R)-[[2-(5,11-dihydrodibenz[b,e][1,4]oxazepine-5-carbonyl)pyrrolidin]-1-yl]-2-(4-methoxyphenyl)ethanone and then reducing the obtained compound.
摘要:
The invention provides a process for production of optically active 2,2-dimethylcyclopropanecarboxylic acid by reacting an optical isomer mixture of 2,2-dimethylcyclo- propanecarboxylic acid with an optically inactive amine to form (precipitate or crystallize) an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, e.g., optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid. According to the invention, the production (including optical resolution, separation of optical isomers, and purification of optical isomers) of optically active 2,2-dimethylcyclopropanecarboxylic acid important as an intermediate in the production of agricultural chemicals and drugs can be easily carried out at a low cost. Further, the invention provides intermediates for the above production (e.g., ammonium salts of optically active 2,2-dimethylcyclopropanecarboxylic acid, particularly, ammonium salts of optically active (S)-(+)-2,2-dimethyl- cyclopropanecarboxylic acid) and reagents for optical resolution for the separation of optically active 2,2- dimethylcyclopropanecarboxylic acid (e.g., optically inactive amines).
摘要:
An industrializable process for preparing V-28-3M useful as an antifungal by methylating V-28-3 efficiently. The process comprises protecting the amino group of the amino sugar moiety of V-28-3 with a suitable protective group, methylating the carboxyl group of V-28-3 with methyl methanesulfonate or p-toluenesulfonate in the presence of a base, and removing the amino protective group of the resultant methyl ester.