Synthesis and biological evaluation of aroylguanidines related to amiloride as inhibitors of the human platelet Na+/H+ exchanger
摘要:
Pyridine and benzene bioisosteres of amiloride were synthesized and evaluated for their inhibitory Potency against the sodium-hydrogen exchanger (NHE) involved in intracellular pH regulation. The inhibition of NHE was determined by using the platelet swelling assay (PSA) in which the swelling of human platelets was induced by their incubation in an acid buffer (pH 6.7). Additionally, the inhibitory potency of the most active compounds was assessed by measuring the inhibition of the EIPA-sensitive Na-22 (+) uptake (UIA) by human platelets after intracellular acidosis. The results indicated that several benzene derivatives and compounds bearing an carbonylguanidine moiety in the meta position of the pyridine nitrogen were much more potent than amiloride (PSA:IC50 = 43.5 muM, UIA:IC50 = 100.1 muM), but less than EIPA, a pyrazine NHE inhibitor (PSA:IC50=0.08 muM, UIA: IC50 - 0.5 muM). In both biological assays (2-amino-5-bromo-pyridine-3-carbonyl)guanidine (32) was the most active molecule (PSA: IC50 = 0.8 muM, UIA : IC50 = 0.8 muM). Our investigations demonstrated that the replacement of the pyrazine ring of amiloride e by a pyridine ora phenyl ring improved the NHE inhibitory potency (phenyl >pyridine >pyrazine). (C) 2002 Elsevier Science Ltd. All rights reserved.
Compounds of the formula ##STR1## have been found to inhibit gastric secretion in mammalian species.
发现具有通式##STR1##的化合物能够抑制哺乳动物的胃分泌。
New developments in the synthesis of lower fluorinated pyridines via diazotization-fluorination of aminopyridines in anhydrous hydrogen fluoride
作者:Max M. Boudakian
DOI:10.1016/s0022-1139(00)82666-4
日期:1981.10
The isolation and stabilization of elusive 4-fluoropyridine as the hydrochloride salt (54% yield) from fluorodediazoniation of 4-aminopyridine in anhydroushydrogenfluoride (AHF) is described. Unlike the low yields (0–13%) recently reported from the chlorodediazoniation of 2,6-diaminopyridine and 3-halo-2,6-diaminopyridine, fluorodediazoniation gave high yields (49–62%) of the corresponding 2,6-difluoropyridines
Aryl and heteroaryl substituted fused pyrrole anti-inflammatory agents
申请人:Amgen Inc.
公开号:US20030096819A1
公开(公告)日:2003-05-22
The present invention comprises a new class of novel aryl and heteroaryl substituted fused pyrrole compounds useful for the prophylaxis and treatment of diseases or conditions, such as TNF-&agr;, IL-1&bgr; , IL-6 and/or IL-8 mediated diseases, and other maladies, such as pain and diabetes. In particular, the compounds of the invention are useful for the prophylaxis and treatment of diseases or conditions involving inflammation. Accordingly, the invention also comprises pharmaceutical compositions comprising the compounds of the invention, methods for the prophylaxis and treatment of inflammation and other maladies, such as pain and diabetes, using the compounds and compositions of the invention, and intermediates and processes useful for the preparation of compounds of the invention. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.
Die Erfindung betrifft neue Phosphorsäure-(thiophosphorsäure)ester, -thioester und -amide der Formel (I),
in der
R' für Alkylsteht,
R2 für OR3, SR3 oder NHR3 steht,
R' für Alkyl steht, A für 0 oder S steht und
X, Y, die gleich oder verschiedenen sein können für H, CI oder Br stehen.
Verfahren zu deren Herstellung und ihre Verwendung als Schädlingsbekämpfungsmittel.
Des weiteren umfaßt die Verbindung neue unterschiedlich substituierte 6-Brom-pyridine, die als Ausgangsmaterialien zur Synthese von Verbindungen der Formel (I) Verwendung finden.