Nano-copper catalysed highly regioselective synthesis of 2,4-disubstituted pyrroles from terminal alkynes and isocyanides
作者:Dipak Kumar Tiwari、Jaya Pogula、B. Sridhar、Dharmendra Kumar Tiwari、Pravin R. Likhar
DOI:10.1039/c5cc04166j
日期:——
Nano-copper(0) stabilized on alumina prepared from Cu–Al hydrotalcite has been reported for completely regioselective synthesis of 2,4-disubstituted pyrroles from unactivated terminal aromatic/aliphatic alkynes and isocyanides.
Developing novel C-4 analogues of pyrrole-based antitubulin agents: weak but critical hydrogen bonding in the colchicine site
作者:Chenxiao Da、Nakul Telang、Kayleigh Hall、Emily Kluball、Peter Barelli、Kara Finzel、Xin Jia、John T. Gupton、Susan L. Mooberry、Glen E. Kellogg
DOI:10.1039/c2md20320k
日期:——
The synthesis, biological evaluation and molecular modeling of a series of pyrrole compounds related to 3,5-dibromo-4-(3,4-dimethoxyphenyl)-1H-pyrrole-2-carboxylic acid that evaluates and optimizes C-4 substituents are reported. The key factor for microtubule depolymerization activity appears to be the presence of an appropriately positioned acceptor for Cys241β in the otherwise hydrophobic subpocket A.
报告了一系列与 3,5-二溴-4-(3,4-二甲氧基苯基)-1H-吡咯-2-羧酸有关的吡咯化合物的合成、生物学评价和分子建模,对 C-4 取代基进行了评估和优化。微管解聚活性的关键因素似乎是在原本疏水性的子口袋 A 中存在一个位置适当的 Cys241β 受体。
The application of vinylogous iminium salt derivatives and microwave accelerated Vilsmeier–Haack reactions to efficient relay syntheses of the polycitone and storniamide natural products
作者:John T. Gupton、Edith J. Banner、Melissa D. Sartin、Matthew B. Coppock、Jonathan E. Hempel、Anastasia Kharlamova、Daniel C. Fisher、Ben C. Giglio、Kristin L. Smith、Matt J. Keough、Timothy M. Smith、Rene P.F. Kanters、Raymond N. Dominey、James A. Sikorski
DOI:10.1016/j.tet.2008.03.038
日期:2008.5
vinylogous iminium salts and microwave accelerated Vilsmeier-Haack formylations are described. The successful strategy relies on the formation of a 2,4-disubstituted pyrrole or a 2,3,4-trisubstituted pyrrolefrom a vinamidinium salt or vinamidinium salt derivative followed by formylation at the 5-position of the pyrrole. Subsequent transformations of the selectively formylated pyrroles lead to efficient
Discovery of pyrazole‐1‐carboxamide derivatives as novel Gi‐biased μ‐opioid receptor agonists
作者:Jae‐Hoon Jung、In Hee Jang、Yeo Ok Kim、Sunhong Kim、Myung Ha Yoon、Yong‐Chul Kim
DOI:10.1002/ddr.21980
日期:2022.11
current SAR data of PZM21 (2a) and its derivatives. New derivatives were biologically evaluated for their agonistic effects on cyclic adenosine monophosphate (cAMP) levels for the Gi pathway and β-arrestin recruitment in MOR/κ-opioid receptor/δ opioid receptor. An optimized selective Gi-biased agonist, Compound 17a, was discovered with potent cAMP inhibitory activities, with a 50% efficacy concentration
引入了不募集 β-抑制蛋白的 μ-阿片受体 (MOR) Gi 偏向激动剂作为一种新的镇痛策略,以克服阿片受体靶向药物的常规不良副作用,例如耐受性、成瘾性、呼吸抑制和便秘. 为了开发新型 Gi 偏向 MOR 激动剂,根据 PZM21 ( 2a ) 及其衍生物的当前 SAR 数据,进行了氨基吡唑核心骨架的设计、合成和构效关系 (SAR) 分析。对新衍生物对 Gi 通路的环磷酸腺苷 (cAMP) 水平和 MOR/κ-阿片受体/δ 阿片受体中的 β-抑制蛋白募集的激动作用进行了生物学评估。一种优化的选择性 Gi 偏向激动剂,化合物17a, 被发现具有有效的 cAMP 抑制活性,50% 功效浓度值为 87.1 nM,并且在 MOR β-arrestin 通路和其他亚型中没有活性。化合物17a的体内镇痛功效通过脊神经结扎和顺铂诱导的周围神经病变啮齿动物神经性疼痛模型以剂量依赖性方式得到证实。
Application of 2-substituted vinamidinium salts to the synthesis of 2,4-disubstituted pyrroles
作者:John T. Gupton、Dale A. Krolikowski、Richard H. Yu、Steve W. Riesinger、James A. Sikorski