Highly Substituted Pyrrolidinones and Pyridones by 4-CR/2-CR Sequence
摘要:
By combining a Ugi four-component reaction of isocyanides, phosphonoacetic acids, primary amines, and glyoxals or alternatively 3-keto aldehydes with a subsequent Wittig ring-closing reaction (using the Horner/Wadsworth/Emmons variant (HWE)), highly substituted 5-oxo-2,5dihydro-1H-pyrrole-2-carboxylic acid amides and 6-oxo-1,2,3,6-tetrahydro-pyridine-2-carboxylic acid amides can be assembled, respectively. The corresponding tandem of a Passerini reaction on 3-keto aldehydes and subsequent Wittig ring closure does not afford the expected six-membered 6-oxo-3,6-dihydro-2H-pyran-2-carboxylic acid amides but instead leads to the formation of 4-oxo-pent-2-enoic acid amides via an elimination route.
Visible-Light-Promoted Photocatalyst-Free Hydroacylation and Diacylation of Alkenes Tuned by NiCl<sub>2</sub>·DME
作者:Xinxin Zhao、Bing Li、Wujiong Xia
DOI:10.1021/acs.orglett.9b04595
日期:2020.2.7
4-dihydropyridines via an acyl radical addition and hydrogen atom transfer pathway under photocatalyst-free conditions. The efficiency was highlighted by wide substrate scope, good to high yields, successful scale-up experiments, and expedient preparation of highly functionalized ketone derivatives. In addition, this protocol allows for the synthesis of 1,4-dicarbonyl compounds through alkene diacylation in the presence
novel pyrido[2,3-b]pyrazines were synthesized as potential antitumor agents for erlotinib-resistant tumors. Known signal inhibitor compounds from our Nested Chemical Library were tested in phenotypic assays on erlotinib-sensitive PC9 and erlotinib-resistant PC9-ER cell lines to find a compound class to be active on erlotinib resistant cell lines. Based on the screening data, novel pyrido[2,3-b]pyrazines
合成了一系列新型的吡啶并[2,3- b ]吡嗪类化合物,作为抗厄洛替尼耐药肿瘤的潜在抗肿瘤药。我们对巢式化学文库中已知的信号抑制剂化合物进行了表型分析,以对厄洛替尼敏感的PC9和耐厄洛替尼的PC9-ER细胞系进行了测试,以找出在耐厄洛替尼的细胞系中具有活性的化合物类别。根据筛选数据,设计合成了新型吡啶并[2,3- b ]吡嗪。探索了杂芳族部分在7位上的取代基位置的影响以及吡啶并吡嗪核心2位未取代的重要性。化合物7n的IC 50抑制PC9的值为0.09μM,抑制PC9-ER的值为0.15μM。我们发现这些结构的一些先导化合物克服了对厄洛替尼的耐药性,这可能成为有望与EGFR T790M突变抗NSCLC的候选药物。这些新型化合物克服厄洛替尼耐药性的作用机制中涉及的信号网络仍有待阐明。
[EN] PYRIDOPYRAZINES AS ANTICANCER AGENTS<br/>[FR] PYRIDOPYRAZINES UTILISÉS EN TANT QU'AGENTS ANTINÉOPLASIQUES
申请人:VICHEM CHEMIE KUTATÓ KFT
公开号:WO2014106763A1
公开(公告)日:2014-07-10
The present invention relates to pyridopyrazine derivatives and solvates, hydrates and pharmaceutically acceptable salts thereof, the use of them in the prevention and/or the treatment of cancer diseases, as well as pharmaceutical compositions containing at least one of them as pharmaceutically active agent(s) together with pharmaceutically acceptable carrier, excipient and/or diluents, especially for the prevention and/or treatment of cancer diseases.˙
An I-2/KOH synergistically promoted direct ring-opening aroylation of benzothiazoles with aryl ketones has been discovered. Aryl ketones were seen to act as carbonyl sources to construct 2-acylbenzothiazoles. This reaction could provide an example for the convergent integration of self-labor domino sequences based on an in situ cross-trapping strategy.
Discovery of 4-Amino-5-(3-bromophenyl)-7-(6-morpholino-pyridin- 3-yl)pyrido[2,3-<i>d</i>]pyrimidine, an Orally Active, Non-Nucleoside Adenosine Kinase Inhibitor
作者:Chih-Hung Lee、Meiqun Jiang、Marlon Cowart、Greg Gfesser、Richard Perner、Ki Hwan Kim、Yu Gui Gu、Michael Williams、Michael F. Jarvis、Elizabeth A. Kowaluk、Andrew O. Stewart、Shripad S. Bhagwat
DOI:10.1021/jm000314x
日期:2001.6.1
Adenosine (ADO) is an endogenous homeostatic inhibitory neuromodulator that reduces cellular excitability at sites of tissue injury and inflammation, inhibition of adenosine kinase (AK), the primary metabolic enzyme for ADO, selectively increases ADO concentrations at sites of tissue trauma and enhances the analgesic and antiinflammatory actions of ADO. Optimization of the high-throughput screening lead, 4-amino-7-aryl-substituted pteridine (5) (AK IC50 = 440 nM), led to the identification of compound 21 (4-amino-5-(3-bromophenyl)-7-(6-morpholino- pyridin-3-yl)pyrido [2,3-d]pyrimidine, ABT-702), a novel, potent (AK IC50 = 1.7 nM) non-nucleoside AK inhibitor with oral. activity in animal models of pain and inflammation.