A Novel Convenient Synthesis of Pyridinyl and Quinolinyl Triflates and Tosylates via One-Pot Diazotization of Aminopyridines and Aminoquinolines in Solution
one-pot transformation of 2-, 3-, and 4-aminopyridines, 2,6-diaminopyridines, and 2-aminoquinoline into the corresponding pyridinyl and quinolinyl trifluoromethanesulfonates and tosylates in solvents was developed. The procedure involves diazotization of the heterocyclic amines with sodium nitrite in mixed hexane–DMSO or hexane–DMF solutions in the presence of trifluoromethanesulfonic acid or p-toluenesulfonic
A convenient synthesis of 2,3,5,6-tetrahalogenopyridines and of 3,5-bis(alkylthio)pyridines from 2,6-diaminopyridine
作者:Ted K. Chen、William T. Flowers
DOI:10.1039/c39800001139
日期:——
Controlled chlorination of 2,6-diaminopyridine (1) affords 2,6-diamino-3,5-dichloropyridine (2a) which is then bis(diazotised) to give 2,3,5,6-tetrachloropyridine (3a); similarly prepared are other 2,3,5,6-tetra(chloro/bromo)pyridines and 2,6-dichloro-3,5-bis(thiocyanato)pyridine (3h), from which 3,5-bis(alkylthio)pyridines are easily obtained.
Discovery of Small-Molecule Inhibitors of Ubiquitin Specific Protease 7 (USP7) Using Integrated NMR and in Silico Techniques
作者:Paola Di Lello、Richard Pastor、Jeremy M. Murray、Robert A. Blake、Frederick Cohen、Terry D. Crawford、Joy Drobnick、Jason Drummond、Lorna Kategaya、Tracy Kleinheinz、Till Maurer、Lionel Rougé、Xianrui Zhao、Ingrid Wertz、Chudi Ndubaku、Vickie Tsui
DOI:10.1021/acs.jmedchem.7b01293
日期:2017.12.28
oncology target for small molecule inhibitors. Herein we describe the biophysical, biochemical, and computational approaches that led to the identification of 4-(2-aminopyridin-3-yl)phenol compounds described by Kategaya ( Nature 2017, 550, 534–538) as specific inhibitors of USP7. Fragment based lead discovery (FBLD) by NMR combined with virtual screening and re-mining of biochemical high-throughput screening
prepared by a highly efficient two-step synthesis that involved a site-selective Suzuki couplingreaction of 2,3,5,6-tetrabromopyridine and a subsequent Pd-catalyzed cyclization that proceeded through a twofold C–Ncouplingreaction with aromatic and aliphatic amines. With the exception of the parent molecule, which was described in a patent without any characterization data, the 5,7-dihydropyrido[3,2-b:5
Three isoreticular ssa-type MOFs derived from bent diisophthalate ligands: exploring the substituent effect on structural stabilities and selective C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> and CO<sub>2</sub>/CH<sub>4</sub> adsorption properties
作者:Yao Wang、Minghui He、Xiaoxia Gao、Piao Long、Yingying Zhang、Haoyan Zhong、Xia Wang、Yabing He
DOI:10.1039/c8dt02686f
日期:——
the effect of the substituents on structural stabilities and gas adsorption properties of MOFs is fundamentally important for rational design and synthesis of new MOFs with better performance. For this purpose, three isoreticular copper-based MOFs (ZJNU-87, ZJNU-88 and ZJNU-89) with ssa-type topology were successfully constructed from bent diisophthalate ligands bearing different substituents. Permanent
评估取代基对MOF的结构稳定性和气体吸附性能的影响,对于合理设计和合成性能更好的新型MOF至关重要。为此,成功地从带有不同取代基的二间苯二酚弯曲配体上构建了三个具有ssa型拓扑结构的等网状铜基MOF(ZJNU -87,ZJNU-88和ZJNU-89)。永久孔隙率研究表明,取代基对骨架抗去溶剂化的稳定性有重大影响。利用非极性Ñ己烷作为激活溶剂可提供更多的优化的永久多孔性非极性或较小极性取代基改性的浙江师范大学-88和浙江师范大学-89。此外,系统地研究了它们对C 2 H 2,CO 2和CH 4的气体吸附性能,揭示了它们有选择性分离C 2 H 2 / CH 4和CO 2 / CH 4的潜力。特别地,就吸收容量和吸附选择性而言,甲氧基改性的ZJNU-89的性能优于甲基改性的ZJNU-88,这可能归因于ZJNU-89的更合适的孔空间。