Efficient Synthesis of New 4-Arylideneimidazolin-5-ones Related to the GFP Chromophore by 2+3 Cyclocondensation of Arylideneimines with Imidate Ylides
作者:Janusz Kowalik、Anthony Baldridge、Laren Tolbert
DOI:10.1055/s-0029-1218796
日期:2010.7
A 2+3 condensation of a wide assortment of Schiff bases, prepared from aromatic aldehydes and primary amines, with methyl 2-(1-ethoxyethylideneamino)acetate allows convenient access to an extensive family of substituted 4-arylideneimidazolin-5-one analogues of the green fluorescent protein (GFP) chromophore. 4-arylideneimidazolin-5-one - azomethine ylide - Schiff bases - heterocycle - 2+3 cycloaddition
T-type calcium channel blockers: spiro-piperidine azetidines and azetidinones—optimization, design and synthesis
作者:Elizabeth M. Smith、Steve Sorota、Hyunjin M. Kim、Brian A. McKittrick、Terry L. Nechuta、Chad Bennett、Chad Knutson、Duane A. Burnett、Jane Kieselgof、Zheng Tan、Diane Rindgen、Terry Bridal、Xiaoping Zhou、Yu-Ping Jia、Zoe Dong、Debbie Mullins、Xiaoping Zhang、Tony Priestley、Craig C. Correll、Deen Tulshian、Michael Czarniecki、William J. Greenlee
DOI:10.1016/j.bmcl.2010.06.012
日期:2010.8
A series of spiro-azetidines and azetidinones has been evaluated as novel blockers of the T-type calcium channel (CaV3.2) which is a new therapeutic target for the potential treatment of both inflammatory and neuropathic pain. Confirmation and optimization of the potency, selectivity and DMPK properties of leads will be described.
已经评估了一系列螺氮杂环丁烷和氮杂环丁酮作为T型钙通道(Ca V 3.2)的新型阻滞剂,它是潜在治疗炎性和神经性疼痛的新治疗靶标。将描述和验证潜在性,选择性和DMPK特性的优化。
Oxidation Potentials of N-Modified Derivatives of the Analgesic Flupirtine Linked to Potassium K<sub>V</sub>7 Channel Opening Activity But Not Hepatocyte Toxicity
作者:Christian J. Lemmerhirt、Mirko Rombach、Anja Bodtke、Patrick J. Bednarski、Andreas Link
DOI:10.1002/cmdc.201402442
日期:2015.2
flupirtine and its analogues were measured by cyclic voltammetry. KV7.2/3 (KCNQ2/3) opening activity was determined by an established assay with HEK293 cells overexpressing these channels. A link was found between the oxidation potentials of the compounds and their EC50 values for potassium channel opening activity. On the other hand, no correlation was observed between oxidation potentials and cytotoxicity
神经元电压门控性钾离子通道(K V)的开放剂作为治疗疼痛(氟吡汀)和癫痫病(瑞替加滨)的治疗剂受到关注。为了更好地了解氟吡汀的作用机理和毒性,我们合成了九种具有不同氧化还原行为的新型类似物。氟吡汀可被氧化代谢为氮杂醌二亚胺;因此,通过循环伏安法测定了氟吡汀及其类似物的氧化电位。K V 7.2 / 3(KCNQ2 / 3)打开活性是通过已建立的测定法来确定的,这些测定法过度表达了这些通道的HEK293细胞。发现化合物的氧化电位与其EC 50之间存在联系钾通道开放活性的数值。另一方面,在转基因小鼠肝细胞(TAMH)的培养物中,氧化电位与细胞毒性之间没有相关性。这些结果支持了氟吡汀的氧化代谢产物有助于作用机理的想法,类似于最近对乙酰氨基酚(对乙酰氨基酚)的提议,但对肝毒性没有影响。
Highly Enantioselective Synthesis of Tetrahydroquinolines via Cobalt(II)-Catalyzed Tandem 1,5-Hydride Transfer/Cyclization
A chiral catalyst prepared from N,N′-dioxide and Co(BF4)2·6H2O was applied in the asymmetric hydride transfer initiated cyclization reaction, giving optically active tetrahydroquinolines in good yields with high enantioselectivities under mild reaction conditions. Meanwhile, in light of the absolute configuration of the product, a possible working model was proposed to explain the origin of the activation
A Latent Reaction in a Model GFP Chromophore Revealed upon Confinement: Photohydroxylation of <i>ortho</i>-Halo Benzylidene-3-methylimidazolidiones via an Electrocylization Process
作者:Shampa R. Samanta、José P. Da Silva、Anthony Baldridge、Laren M. Tolbert、V. Ramamurthy
DOI:10.1021/ol5013058
日期:2014.6.20
Excited state behavior of halogensubstituted model GFP chromophores was investigated in an acetonitrile solution and in a confined environment provided by an octa acid capsule in water. Of the ortho, meta, and para halogensubstituted GFP chromophores only the ortho compounds gave a new product resulting from an unprecedented photosubstitution of halogens by the hydroxyl group. This unusual reaction