Identification of a Potent Sodium Hydrogen Exchanger Isoform 1 (NHE1) Inhibitor with a Suitable Profile for Chronic Dosing and Demonstrated Cardioprotective Effects in a Preclinical Model of Myocardial Infarction in the Rat
摘要:
Sodium-hydrogen exchanger isoform 1 (NHE1) is a ubiquitously expressed transmembrane ion channel responsible for intracellular pH regulation. During myocardial ischemia, low pH activates NHE1 and causes increased intracellular calcium levels and aberrant cellular processes, leading to myocardial stunning, arrhythmias, and ultimately cell damage and death. The role of NHE1 in cardiac injury has prompted interest in the development of NHE1 inhibitors for the treatment of heart failure. This report outlines our efforts to identify a compound suitable for once daily, oral administration with low drug-drug interaction potential starting from NHE1 inhibitor sabiporide. Substitution of a piperidine for the piperazine of sabiporide followed by replacement of the pyrrole moiety and subsequent optimization to improve potency and eliminate off-target activities resulted in the identification of N-[4-(1-acetyl-piperidin-4-yl)-3-trifluoromethyl-benzoyl]-guanidine (60). Pharmacological evaluation of 60 revealed a remarkable ability to prevent ischemic damage in an ex vivo model of ischemia reperfusion injury in isolated rat hearts.
Synthesis and kinetic studies of a low-molecular weight organocatalyst for phosphate hydrolysis in water
作者:Michael Merschky、Carsten Schmuck
DOI:10.1039/b914974k
日期:——
Kinetic studies of a low-molecular weight organocatalyst 1 are presented. Compound 1 contains two histidines and one cationic side chain attached to a central aromatic core. In aqueous solution 1 accelerates the hydrolysis of a prototypal phosphodiester with rate enhancements of up to two orders of magnitude. A detailed HPLC analysis of hydrolysis experiments in Bis-Tris-buffer showed that the buffer itself can act as a nucleophile at least with the cyclic phosphate 16. Compound 1 is also an efficient host for the binding of bis-(para-nitrophenyl)-phosphate 14 with extraordinary high affinity of Kass = 24 400 M−1 in buffered water.
Solid phase synthesis of a prototype of a new class of biomimetic receptors for anionic carbohydrates
作者:Carsten Schmuck、Maija Heller
DOI:10.1039/b613660e
日期:——
A solid phase synthesis for a new biomimetic receptor 1 was developed. First binding studies show that 1 binds anionic carbohydrates such as glucose-1-phosphate and cAMP with association constants in the lower millimolar range in 20% buffered water in DMSO using both polar and apolar interactions.
[EN] PYRROLIDINYL AND PIPERIDINYL COMPOUNDS USEFUL AS NHE-1 INHIBITORS<br/>[FR] COMPOSÉS PYRROLIDINYLIQUE ET PIPÉRIDINYLIQUE UTILES COMME INHIBITEURS DE NHE-1
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2010005783A1
公开(公告)日:2010-01-14
Disclosed are compounds of formula (I) and compositions of the present invention which are inhibitors of the sodium proton exchanger isoform-1 (NHE-I). Also disclosed are methods of using and making the same.
作者:Zahraa S. Al-Taie、Joseph M. Anderson、Laura Bischoff、Jeppe Christensen、Simon J. Coles、Richard Froom、Mari E. Gibbard、Leigh F. Jones、Frank F.J. de Kleijne、Patrick J. Murphy、Emma C. Thompson
DOI:10.1016/j.tet.2021.132093
日期:2021.6
We report the preparation of a range of N-protected amino acidderived guanidine organocatalysts and their application to the Michael addition of 2-hydroxy-1,4-napthoquinone to β-nitrostyrene, achieving a maximum ee of 26%. Whilst these catalysts gave poor ees, the structural variation together with the X-ray crystallographic study of the intra- and intermolecular hydrogen bonding reported suggest
我们报告了一系列N-保护氨基酸衍生的胍有机催化剂的制备及其在 2-羟基-1,4-萘醌与 β-硝基苯乙烯的迈克尔加成中的应用,实现了 26% 的最大 ee。虽然这些催化剂的 ees 较差,但结构变化以及分子内和分子间氢键的 X 射线晶体学研究表明,C 2对称催化剂是该方法进一步发展的先导化合物。
A Novel Synthesis of the 2-Aminoimidazol-4-carbaldehyde Derivatives, Versatile Synthetic Intermediates for 2-Aminoimidazole Alkaloids
作者:Naoki Ando、Shiro Terashima
DOI:10.1055/s-2006-950250
日期:2006.10
The title synthesis was achieved by the reaction of t-butoxycarbonylguanidine with 3-bromo-1,1-dimethoxypropan-2-one as a key step. Starting with 1-tert-butoxycarbonyl-2-tert-butoxycarbonylaminoimidazol-4-carbaldehyde thus obtained expeditious synthesis of oroidin, hymenidin, dispacamide and monobromodispacamide, the representative 2-aminoimidazole alkaloids, was accomplished.