合成并研究了在[ 3]中带有2-,N 6-,7-,8和/或9位取代基的腺嘌呤衍生物和一系列脱氮嘌呤。H]腺嘌呤在大鼠大脑皮层膜制剂(rAde1R)中对腺嘌呤受体的结合研究。观察到陡峭的结构-活性关系。最好的取代是在8位(氨基,二甲基氨基,哌啶基,哌嗪基)或9位(2-吗啉代乙基)中带有碱性残基或在6位氨基官能团处引入极性取代基(羟基,氨基,乙酰基)是最好的修改。在稳定表达rAde1R的1321N1星形细胞瘤细胞的腺苷酸环化酶测定中,对所选腺嘌呤衍生物的功能评估表明,所研究的所有化合物均为激动剂或部分激动剂。在人类胚胎肾脏(HEK293)细胞的结合研究中还对化合物的子集进行了研究,该细胞还表达了高亲和力的腺嘌呤结合位点。人细胞系的结构亲和力关系与rAde1R相似,但不完全相同。特别是,N 6-乙酰腺嘌呤(25,K i大鼠:2.85μM; K i人:0.515μM)和8-氨基腺嘌呤(33,K i
The present invention provides: a novel use of a specific bicyclic nitrogen-containing heterocyclic compound as a PDE7 inhibitor; a novel bicyclic nitrogen-containing heterocyclic compound having a PDE7 inhibitory effect, a method for producing the compound, a use of the compound, and a pharmaceutical composition containing the PDE7 inhibitor or the compound; and others. More specifically, the present invention provides a PDE7 inhibitor containing the compound represented by the formula (I):
[wherein the symbols have the same meanings as those described in the description] or a pharmaceutically acceptable salt thereof as an active ingredient.
Copper(II)-Photocatalyzed N–H Alkylation with Alkanes
作者:Yi-Wen Zheng、Rok Narobe、Karsten Donabauer、Shahboz Yakubov、Burkhard König
DOI:10.1021/acscatal.0c01924
日期:2020.8.7
of N–H bonds with alkanes using a photoinduced copper(II) peroxide catalytic system. Upon light irradiation, the peroxide serves as a hydrogen atom transfer reagent to activate stable C(sp3)–H bonds for the reaction with a broad range of nitrogen nucleophiles. The method enables the chemoselective alkylation of amides and is utilized for the late-stage functionalization of N–H bond containing pharmaceuticals
Enhanced selectivity for inhibition of analog-sensitive protein kinases through scaffold optimization
作者:Chao Zhang、Kevan M. Shokat
DOI:10.1016/j.tet.2007.02.089
日期:2007.6
highly potent mutant kinase-specific inhibitorsbased on a pyrazolopyrimidine scaffold. Here, we asked if the selectivity of the resulting pyrazolopyrimidines could be improved, as they inhibit several wild-type kinases with low-micromolar IC50 values. Our approach to improve the selectivity of allele-specific inhibitors was to explore a second kinaseinhibitorscaffold. A series of 6,9-disubstituted purines
6-(Alkylamino)-9-alkylpurines. A New Class of Potential Antipsychotic Agents
作者:James L. Kelley、R. Morris Bullock、Mark P. Krochmal、Ed W. McLean、James A. Linn、Micheal J. Durcan、Barrett R. Cooper
DOI:10.1021/jm960662s
日期:1997.9.1
A series of 6-(alkylamino)-9-alkylpurines was synthesized and evaluated for the property of antagonizing the behavioral effects in animals of the dopamine agonist apomorphine. This model for identifying potential antipsychotic agents is based on the hypothesis that agents that antagonize apomorphine-induced aggressive behavior in rats and apomorphine-induced climbing in mice, but that do not block stereotyped behavior, could have an antipsychotic effect in humans without producing extrapyramidal side effects. The antiaggressive-behavior activity of lead compound 1 (6-(dimethylamino)-9-(3-phenylalaninamidobenzyl)-9H-purine) was improved 48-fold with 6-(cyclopropylamino)-9-(cyclopropylmethyl)-2-(trifluoromethyl)-9H-purine (80) (po ED50 of 2 mg/kg), which was obtained through an iterative sequence of structure-activity relationship studies that encompassed evaluation of the effects of structure variations at the purine 9-, 6-, and 2-positions. Potency was enhanced with a 9-cyclopropyl group, the duration of action was improved with the 6-(cyclopropylamino) substituent, potency was further enhanced with an N-formyl prodrug, and an agent with reduced cardiovascular effect emerged with the 2-trifluoromethyl purine 80. This potential antipsychotic agent was not developed further due to undesirable effects on the stomach.
8-Bromo-9-alkyl adenine derivatives as tools for developing new adenosine A2A and A2B receptors ligands
作者:Catia Lambertucci、Ippolito Antonini、Michela Buccioni、Diego Dal Ben、Dhuldeo D. Kachare、Rosaria Volpini、Karl-Norbert Klotz、Gloria Cristalli
DOI:10.1016/j.bmc.2009.02.030
日期:2009.4
Importance of making available selective adenosine receptor antagonists is boosted by recent findings of adenosine involvement in many CNS dysfunctions. In the present work a series of 8-bromo-9-alkyl adenines are prepared and fully characterized in radioligand binding assays or functional cyclase experiments in respect to their interaction with all the four adenosine receptor subtypes. Results show that the presence of the bromine atom in 8-position of 9-substituted adenines promotes in general the interaction with the adenosine receptors, in particular at the A(2A) subtype. The present study also demonstrates that adenine derivatives could be a good starting point to obtain selective adenosine A(2B) receptor antagonists. (c) 2009 Elsevier Ltd. All rights reserved.