Polyfunctional Tetrahydropyrido[2,3-b]pyrazine Scaffolds from 4-Phenylsulfonyl Tetrafluoropyridine
摘要:
Polyfunctional tetrahydropyrido[2,3-b]pyrazine scaffolds can be synthesized by sequential reaction of pentafluoropyridine with sodium phenylsulfinate and an appropriate diamine. The polyfunctionality possessed by the difluorinated tetrahydropyrido [2,3-b] pyrazine scaffolds was demonstrated in selected model reactions with nucleophiles to give access to various polysubstituted [6,6]-ring fused systems.
A series of substituted diheteroaryl sulfides was synthesized by the reaction of 4,6-diaminopyrimidine-2(1H)-thione with fluoro- and chloroheteroaromatic compounds in the presence of Na2CO3 in acetonitrile under reflux conditions. Our study indicated that 4,6-diaminopyrimidine-2(1H)-thione reacts with fluoro- and chloroheteroaromatic compounds chemoselectively as S- rather than N-nucleophile. The structures
在Na 2 CO 3存在下,在乙腈中,在回流条件下,通过4,6-二氨基嘧啶-2(1 H)-硫酮与氟-和氯杂芳族化合物的反应,合成了一系列取代的二杂芳基硫化物。我们的研究表明,4,6-二氨基嘧啶-2(1 H)-硫酮与氟和氯杂芳族化合物以S-而非N-亲核试剂发生化学选择性反应。合成的化合物的结构通过IR,1 H,19 F和13 C NMR光谱以及元素分析和X射线结构分析得到确认。
Design, Synthesis and Evaluation of Antibacterial Effects of a New Class of Piperazinylquinolone Derivatives
Pentafluoropyridine derivatives and cyanuric chloride were used for the synthesis of newpiperazinylquinolonederivatives. These reactions provided N‐fluoropyridiyl and N‐cyanoryl chloride piperazinylquinolonederivatives in good yields. Synthesized compounds were evaluated for their antibacterial activities. These compounds displayed good to excellent antibacterial activities.
Simultaneous detection of small molecule thiols with a simple <sup>19</sup>F NMR platform
作者:Zhaofei Chai、Qiong Wu、Kai Cheng、Xiaoli Liu、Ling Jiang、Maili Liu、Conggang Li
DOI:10.1039/d0sc04664g
日期:——
A 19F NMR platform, capable of discriminating various small molecule thiols, was designed for in-cell thiol differentiation and monitoring, and further detection of the γ-GT activity, demonstrating the wide applications in thiol-related processes.
Pyrido[3,2-b][1,4]oxazine and pyrido[2,3-b][1,4]benzoxazine systems from tetrafluoropyridine derivatives
作者:Graham Sandford、Rachel Slater、Dmitrii S. Yufit、Judith A.K. Howard、Antonio Vong
DOI:10.1016/j.jfluchem.2014.05.003
日期:2014.11
Pyrido[3,2-b][1,4]oxazine and pyrido[2,3-b][1,4]benzoxazine systems were synthesised by annelation reactions involving highly fluorinated pyridine derivatives and nitrogen and oxygen centred difunctional nucleophiles by sequential regioselective nucleophilic aromatic substitution processes.
Synthesis of substituted imidazopyridines from perfluorinated pyridine derivatives
作者:Alireza Poorfreidoni、Reza Ranjbar-Karimi
DOI:10.1016/j.tetlet.2016.11.045
日期:2016.12
4-Phenylsulfonyl tetrafluoropyridine was reacted with various N-aryl amidines to give the corresponding imidazopyridine systems via an intramolecular nucleophilic aromatic substitution process whilst pentafluoropyridine gave N′-(perfluoropyridin-4-yl)-N-phenylbenzimidamide and 2,3,5,6-tetrafluoro-N-phenylpyridin-4-amine by a competing elimination reaction.