new chiralstationaryphase was tested against racemic mixtures of aromatic aminoacids, after appropriate optimization of both the conditions of preparation of the plates and the mobile phase composition. The enantioselectivity values obtained for the studied compounds were higher than those reported in the literature for similar systems. The method employed here for the preparation of chiral HPTLC
One-Pot Biocatalytic Synthesis of Substituted<scp>d</scp>-Tryptophans from Indoles Enabled by an Engineered Aminotransferase
作者:Fabio Parmeggiani、Arnau Rué Casamajo、Curtis J. W. Walton、James L. Galman、Nicholas J. Turner、Roberto A. Chica
DOI:10.1021/acscatal.9b00739
日期:2019.4.5
d-Tryptophan and its derivatives are important precursors of a wide range of indole-containing pharmaceuticals and naturalproducts. Here, we developed a one-pot biocatalytic process enabling the synthesis of d-tryptophans from indoles in good yields and high enantiomeric excess (91% to >99%). Our method couples the synthesis of l-tryptophans catalyzed by Salmonella enterica tryptophan synthase with
Disclosed are (1) a cyclic hexapeptide represented by formula [I] or a salt thereof:
wherein X and Y each represent a-amino acid residues, A represents a D-acidic-a-amino acid residue, B represents a neutral-a-amino acid residue, C represents an L-a-amino acid residue and D represents a D-a-amino acid residue having an aromatic ring group; and (2) a pharmaceutical composition comprising the peptide represented by formula [I] or a pharmaceutically acceptable salt thereof as an active ingredient.
Methods and compositions for the prophylactic and/or therapeutic treatment of organ hypofunction
申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP0626174A2
公开(公告)日:1994-11-30
Compounds having antagonistic activity on endothelin receptors can be effectively used for prophylaxis and/or treatment of hypofunction of organs which occurs in their surgery or transplant.
对内皮素受体具有拮抗活性的化合物可有效用于预防和/或治疗器官移植手术中出现的器官功能减退。
Sustained-release preparation of anti-endothelin substance
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0647449A1
公开(公告)日:1995-04-12
A sustained-release preparation containing an anti-endothelin substance and a biodegradable polymer.
The sustained-release preparation of the present invention sustainedly releases an anti-endothelin substance, serving well in the treatment of endothelin-associated diseases.