α-Benzyl-γ-L-glutamyltaurine as a Useful Intermediate for the Synthesis of a Brain-Peptide, γ-L-Glutamyltaurine<sup>1</sup>
作者:Kunihiko Higashiura、Kazuharu Ienaga
DOI:10.1055/s-1992-26105
日期:——
The synthesis of a neuropeptide, γ-L-glutamyltaurine (3a), was achieved via α-benzyl-γ-L-glutamyltaurine (2a) as a useful intermediate, which was prepared from α-benzyl N-tert-butoxycarbonyl-L-glutamate (1a) and taurine (2-aminoethanesulfonic acid) by active ester method. The preparation of its α-isomer 3b was also described.
Lipoic acid analogs with enhanced pharmacological activity
作者:Steven A. Kates、Ralph A. Casale、Alexander Baguisi、Reinier Beeuwkes
DOI:10.1016/j.bmc.2013.10.057
日期:2014.1
Lipoic acid (1,2-dithiolane-3-pentanoic acid) is a pharmacophore with unique antioxidant and cytoprotective properties. We synthesized a library based upon the condensation of natural and unnatural amino acids with the carboxylic acid moiety of lipoic acid. SAR studies were conducted using a cardiac ischemia-reperfusion animal model. Cytoprotective efficacy was associated with the R-enantiomer of the dithiolane. Potency of library compounds was dictated by the acidic strength of the adduct. alpha-N-[(R)1,2-dithiolane-3-pentanoyl]-L-glutamyl-L-alanine, designated CMX-2043, was chosen for further pharmacologic evaluation. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
IENAGA, KAZUHARU;NAKAMURA, KO;HIGASHIURA, KUNIHIKO;TOYOMAKI, YOSHIO;KIMUR+, CHEM. AND PHARM. BULL., 36,(1988) N 8, C. 2796-2801