Process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides
申请人:——
公开号:US20010031858A1
公开(公告)日:2001-10-18
The present invention relates to a process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides of the formula I,
1
in which the anions X are physiologically acceptable anions, and their analogs, which are effective inhibitors of the blood coagulation factor Xa and which can be used, for example, for preventing thromboses. The process according to the invention comprises the coupling of 2-[2-acetylamino-3-(4-amidinophenyl)propionylamino]-2-cyclohexylacetic acid, which is obtained from 2-[2-acetylamino-3-(4-cyanophenyl)acryloylamino]-2-cyclohexylacetic acid by asymmetric hydrogenation and conversion of the cyano group into the amidine, or a salt thereof, with a 3-(2-amino-2-carbamoylethyl)-1-methylpyridinium salt or a salt thereof. The invention furthermore provides starting materials and intermediates for this process, processes for their preparation and acetyl-(S)-4-amidiniophenylalanyl-(S)-cyclohexylglycyl-(S)-(1-methyl-3-pyridinio)alaninamide as ditosylate salt.
Pseudo-peptides derived from isomannide: inhibitors of serine proteases
作者:Thalita G. Barros、Sergio Pinheiro、J. S. Williamson、Amílcar Tanuri、M. Gomes、Helena S. Pereira、R. M. Brindeiro、José B. A. Neto、O. A. C. Antunes、Estela M. F. Muri
DOI:10.1007/s00726-009-0273-4
日期:2010.3
In this paper, we describe the synthesis of a novel class of pseudo-peptides derived from isomannide and several oxazolones as potential inhibitors of serine proteases as well as preliminary pharmacological assays for hepatitis C. Hepatitis C, dengue and West Nile fever are among the most important flaviviruses that share one important serine protease enzyme. Serine proteases belong to the most studied class of proteolytic enzymes and are a primary target in the drug development field. Several pseudo-peptides were obtained in good yields from the reaction of isomannide and oxazolones, and their anti-HCV potential using the HCV replicon-based assay was shown.
Benzylidene–oxazolones as photoswitches: photochemistry and theoretical calculations
作者:Ignacio Funes-Ardoiz、Marina Blanco-Lomas、Pedro J. Campos、Diego Sampedro
DOI:10.1016/j.tet.2013.09.009
日期:2013.11
The photophysics and photochemistry of a family of compounds proposed as efficient molecular photoswitches is presented. The effect of different light sources, substituents and solvents in the photostationary state has been explored. A detailed mechanistic description is also discussed. (C) 2013 Elsevier Ltd. All rights reserved.
SUH, JUNGHUN;LEE, EUN;MYOUNG, YOUNG, CHAN;KIM, MINWOO;KIM, SOODAN, J. ORG. CHEM., 1985, 50, N 7, 977-980