New Diarylmethylpiperazines as Potent and Selective Nonpeptidic δ Opioid Receptor Agonists with Increased In Vitro Metabolic Stability
摘要:
Nonpeptide delta opioid agonists are analgesics with a potentially improved side-effect and abuse liability profile, compared to classical opioids. Andrews analysis of the NIH nonpeptide lead SNC-80 suggested the removal of substituents not predicted to contribute to binding. This approach led to a simplified lead, N,N-diethyl-4-[phenyl( 1-piperazinyl)methyl]benzamide (1), which retained potent binding affinity and selectivity to the human delta receptor (IC50 = 11 nM, mu/delta = 740, kappa/delta > 900) and potency as a full agonist (EC50 = 36 nM) but had a markedly reduced molecular weight, only one chiral center, and increased in vitro metabolic stability. From this lead, the key pharmacophore groups for delta receptor affinity and activation were more clearly defined by SAR and mutagenesis studies. Further structural modifications on the basis of 1 confirmed the importance of the N,N-diethylbenzamide group and the piperazine lower basic nitrogen for delta binding, in agreement with mutagenesis data. A number of piperazine N-alkyl substituents were tolerated. In contrast, modifications of the phenyl group led to the discovery of a series of diarylmethylpiperazines exemplified by N,N-diethyl-4-[1-piperazinyl(8-quinolinyl)- methyl]benzamide (56) which had an improved in vitro binding profile (IC50 = 0.5 nM, mu/delta = 1239, EC50 = 3.6 nM) and increased in vitro metabolic stability compared to SNC-80.
Compounds of general formula (I), wherein R
1
selected from phenyl, pyridinyl, thiophenyl, furanyl, imidazolyl, and triazolyl; where each R
1
phenyl ring and R
1
heteroaromatic ring may optionally and independently be further substituted by 1, 2 or 3 substituents selected from straight and branched C
1
-C
6
alkyl, NO
2
, CF
3
, C
1
-C
6
alkoxy, chloro, fluoro, bromo, and iodo.
An Improved Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides
作者:Jun Pan、Xinyan Wang、Yong Zhang、Stephen L. Buchwald
DOI:10.1021/ol202098h
日期:2011.9.16
A facile Pd-catalyzed conversion of aryl and vinyl triflates to aryl and vinyl halides (bromides and chlorides) is described. This method allows convenient access to a variety of aryl, heteroaryl, and vinyl halides in good to excellent yields and with greatly simplified conditions relative to our previous report.
Dual Nickel-/Palladium-Catalyzed Reductive Cross-Coupling Reactions between Two Phenol Derivatives
作者:Baojian Xiong、Yue Li、Yin Wei、Søren Kramer、Zhong Lian
DOI:10.1021/acs.orglett.0c02165
日期:2020.8.21
Cross-coupling between substrates that can be easily derived from phenols is highly attractive due to the abundance of phenols. Here, we report a dual nickel-/palladium-catalyzed reductive cross-coupling between aryl tosylates and aryltriflates; both substrates can be accessed in just one step from readily available phenols. The reaction has a broad functional group tolerance and substrate scope (>60
[EN] HETEROCYCLE CDK INHIBITORS AND THEIR USE THEREOF<br/>[FR] INHIBITEURS DE CDK À HÉTÉROCYCLE ET LEUR UTILISATION
申请人:PRELUDE THERAPEUTICS INC
公开号:WO2022035799A1
公开(公告)日:2022-02-17
The disclosure is directed to, in part, to heterocycle CDK inhibitors, pharmaceutical compositions comprising the same, as well as methods of their use and preparation.
该披露涉及部分杂环CDK抑制剂,包括含有这些抑制剂的药物组合物,以及它们的使用和制备方法。
Piperazinomethylbenzamides as delta-opioid receptor agonists
申请人:AstraZeneca AB
公开号:US06680318B2
公开(公告)日:2004-01-20
The present application is directed to compounds having the general formula:
and to the use of these compounds in therapeutic methods.