Potassium fluoride impregnated on natural zeolite as a new solid base system effectively catalyzes the coupling
of thiophenols with electron-deficient fluoro-, chloro- and bromo-arenes in DMSO. This versatile and efficient solid base
has been demonstrated to afford the corresponding desired products in good to excellent yields. This procedure provides a
convenient, efficient and practical method for the preparation of diaryl thioethers.
Facile aromatic nucleophilic substitution (S<sub>N</sub>Ar) reactions in ionic liquids: an electrophile–nucleophile dual activation by [Omim]Br for the reaction
作者:Xiao Zhang、Guo-ping Lu、Chun Cai
DOI:10.1039/c6gc01742h
日期:——
A facile aromatic nucleophilic substitutionreaction (SNAr) in recyclable [Omim]Br under relatively mild conditions has been described. An electrophile-nucleophile dual activation by [Omim]Br is also discovered based on control experiments,...
The [Cu]-catalyzed SNAR reactions: direct amination of electron deficient aryl halides with sodium azide and the synthesis of arylthioethers under Cu(II)–ascorbate redox system
作者:Yogesh Goriya、C.V. Ramana
DOI:10.1016/j.tet.2010.07.032
日期:2010.9
A one pot [Cu]-promoted SNAr reaction of electron-deficient halobenzenes with sodium azide and the reduction of the intermediate arylazides under the same Cu(II)–ascorbate redox conditions leading to anilines has been documented. Control experiments revealed that both ascorbate and proline play important role in the reaction path way. Further, the use of this catalytic Cu(II)–ascorbate redox system
已有文献证明,在相同的Cu(II)-抗坏血酸氧化还原条件下,电子缺陷型卤代苯与叠氮化钠的一锅[Cu]促进S N Ar反应和中间芳基叠氮化物的还原导致苯胺。对照实验表明,抗坏血酸和脯氨酸均在反应路径中起重要作用。此外,已经探索使用这种催化性的Cu(II)-抗坏血酸氧化还原系统来合成芳基硫醚。
Itai; Yamamoto, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1948, vol. 68, p. 128
作者:Itai、Yamamoto
DOI:——
日期:——
Intra- and Intermolecular C−S Bond Formation Using a Single Catalytic System: First Direct Access to Arylthiobenzothiazoles
作者:Siva Murru、Harisadhan Ghosh、Santosh K. Sahoo、Bhisma K. Patel
DOI:10.1021/ol9017535
日期:2009.10.1
We have for the first time developed two ligand-assisted Cu(I)-catalyzed sequential intra- and intermolecular Sarylations leading to the direct synthesis of arylthiobenzothiazoles in one pot without an inert atmosphere. Low catalyst loading, inexpensive metal catalyst and ligand, lower reaction temperature, and shorter reaction times make this method superior to all reported methods for the synthesis of arylthiobenzothiazole.