[EN] IMIDAZO [1, 2 - B] PYRIDAZINE - BASED COMPOUNDS, COMPOSITIONS COMPRISING THEM, AND USES THEREOF [FR] COMPOSÉS À BASE D'IMIDAZO [1, 2-B] PYRIDAZINE, COMPOSITIONS LES COMPRENANT ET UTILISATIONS DE CEUX-CI
Tetramethylammonium Fluoride Alcohol Adducts for S<sub>N</sub>Ar Fluorination
作者:María T. Morales-Colón、Yi Yang See、So Jeong Lee、Peter J. H. Scott、Douglas C. Bland、Melanie S. Sanford
DOI:10.1021/acs.orglett.1c01490
日期:2021.6.4
aprotic conditions to maintain the nucleophilicity of fluoride and suppress the generation of side products. This report addresses this challenge by leveraging tetramethylammonium fluoride alcohol adducts (Me4NF·ROH) as fluoride sources for SNAr fluorination. Through systematic tuning of the alcohol substituent (R), tetramethylammonium fluoride tert-amyl alcohol (Me4NF·t-AmylOH) was identified as an
亲核芳族氟化 (S N Ar) 是形成 C(sp 2 )-F 键的最常用方法之一。尽管最近取得了许多进展,但这些转化的长期限制是需要严格干燥的非质子条件来保持氟化物的亲核性并抑制副产物的产生。本报告通过利用四甲基氟化铵醇加合物 (Me 4 NF·ROH) 作为 S N Ar 氟化的氟化物来源解决了这一挑战。通过系统调整醇取代基 (R),四甲基氟化铵叔戊醇 (Me 4 NF· t-AmylOH) 被确定为在温和方便的条件下(DMSO 中 80°C,无需干燥试剂或溶剂)下用于 S N Ar 氟化的廉价、实用且台式稳定的试剂。展示了超过 50 种(杂)芳基卤化物和硝基芳烃亲电子试剂的底物范围。
Cephalosporin derivatives
申请人:Imperial Chemical Industries plc
公开号:US05049558A1
公开(公告)日:1991-09-17
A cephalosporin derivative of the formula I: ##STR1## in which X is ##STR2## represents one of C-7 acyl groups known in the cephalosporin art, R3 is hydrogen or methoxy, R4 is hydrogen, optionally substituted alkyl or allyl, and R5 is an aromatic heterocyclic ring system which is linked via carbon, and which contains a quaternized nitrogen atom.
Inhibition of AAK1 Kinase as a Novel Therapeutic Approach to Treat Neuropathic Pain
作者:W. Kostich、B. D. Hamman、Y.-W. Li、S. Naidu、K. Dandapani、J. Feng、A. Easton、C. Bourin、K. Baker、J. Allen、K. Savelieva、J. V. Louis、M. Dokania、S. Elavazhagan、P. Vattikundala、V. Sharma、M. L. Das、G. Shankar、A. Kumar、V. K. Holenarsipur、M. Gulianello、T. Molski、J. M. Brown、M. Lewis、Y. Huang、Y. Lu、R. Pieschl、K. OMalley、J. Lippy、A. Nouraldeen、T. H. Lanthorn、G. Ye、A. Wilson、A. Balakrishnan、R. Denton、J. E. Grace、K. A. Lentz、K. S. Santone、Y. Bi、A. Main、J. Swaffield、K. Carson、S. Mandlekar、R. K. Vikramadithyan、S. J. Nara、C. Dzierba、J. Bronson、J. E. Macor、R. Zaczek、R. Westphal、L. Kiss、L. Bristow、C. M. Conway、B. Zambrowicz、C. F. Albright
DOI:10.1124/jpet.116.235333
日期:2016.8.1
To identify novel targets for neuropathic pain, 3097 mouse knockout lines were tested in acute and persistent pain behavior assays. One of the lines from this screen, which contained a null allele of the adapter protein-2 associated kinase 1 (AAK1) gene, had a normal response in acute pain assays (hot plate, phase I formalin), but a markedly reduced response to persistent pain in phase II formalin. AAK1 knockout mice also failed to develop tactile allodynia following the Chung procedure of spinal nerve ligation (SNL). Based on these findings, potent, small-molecule inhibitors of AAK1 were identified. Studies in mice showed that one such inhibitor, LP-935509, caused a reduced pain response in phase II formalin and reversed fully established pain behavior following the SNL procedure. Further studies showed that the inhibitor also reduced evoked pain responses in the rat chronic constriction injury (CCI) model and the rat streptozotocin model of diabetic peripheral neuropathy. Using a nonbrain-penetrant AAK1 inhibitor and local administration of an AAK1 inhibitor, the relevant pool of AAK1 for antineuropathic action was found to be in the spinal cord. Consistent with these results, AAK1 inhibitors dose-dependently reduced the increased spontaneous neural activity in the spinal cord caused by CCI and blocked the development of windup induced by repeated electrical stimulation of the paw. The mechanism of AAK1 antinociception was further investigated with inhibitors of α2 adrenergic and opioid receptors. These studies showed that α2 adrenergic receptor inhibitors, but not opioid receptor inhibitors, not only prevented AAK1 inhibitor antineuropathic action in behavioral assays, but also blocked the AAK1 inhibitor–induced reduction in spinal neural activity in the rat CCI model. Hence, AAK1 inhibitors are a novel therapeutic approach to neuropathic pain with activity in animal models that is mechanistically linked (behaviorally and electrophysiologically) to α2 adrenergic signaling, a pathway known to be antinociceptive in humans.
Method for Producing 3, 6-Disubstituted Imidazo[1, 2-b]Pyridazine Derivative
申请人:DAIICHI SANKYO COMPANY, LIMITED
公开号:US20200062765A1
公开(公告)日:2020-02-27
Provided is a novel and industrially useful method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative. The present invention provides a method for producing a 3, 6-disubstituted imidazo[1, 2-b]pyridazine derivative, which uses 6-fluoroimidazo[1, 2-b]pyridazine as a starting material, while using an aromatic substitution reaction that utilizes C—H activation by means of palladium.
Imidazo[1,2-b]pyridazine-based compounds, compositions comprising them, and methods of their use
申请人:Bi Yingzhi
公开号:US08969565B2
公开(公告)日:2015-03-03
Imidazo[1,2-b]pyridazine-based compounds of the formula:
are disclosed, wherein R1, R2 and R3 are defined herein. Compositions comprising the compounds and methods of their use to treat, manage and/or prevent diseases and disorders mediated by mediated by adaptor associated kinase 1 activity are also disclosed.