Visible-light-mediated direct perfluoroalkylation and trifluoromethylation of free anilines
作者:Chun-Yang He、Ji-Wei Gu、Xingang Zhang
DOI:10.1016/j.tetlet.2017.09.010
日期:2017.10
A mild, operationally simple method for direct perfluoroalkylation and trifluoromethylation of anilines through visible-light-mediated photoredox catalysis from broadly available perfluoroalkyl iodides and free anilines is described. The method provides a facile route for application in drug discovery and development.
A novel and facile copper-catalyzed synthetic methodology was developed to access a large variety of 4-phosphoryl-substituted 1-naphthylamines by reacting various 1-naphthylamines with different diarylphosphine oxides in the presence of Cu(OAc)2 and Ag2CO3 in one pot under mild reaction conditions. This copper-catalyzed synthetic system was also suitable for being employed to synthesize 4-trifluoromethyl-substituted
在Cu(OAc)2和Ag 2 CO 3的存在下,通过使各种1-萘胺与不同的二芳基膦氧化物反应,开发了一种新颖且简便的铜催化合成方法,以获取多种4-磷酰基取代的1-萘胺。一锅在温和的反应条件下。该铜催化的合成系统也适合用于在温和的反应条件下,在DMSO中,在CuI和NaOAc中,在CuI和NaOAc存在下,使各种1-萘胺与Togni's试剂反应,以合成4-三氟甲基取代的1-萘胺。
Perfluoroalkylation of anilines in the presence of zinc and sulphur dioxide
作者:Claude Wakselman、Marc Tordeux
DOI:10.1039/c39870001701
日期:——
Arylamines are transformed into their ortho- and para-trifluoromethyl derivatives by the action of trifluoromethyl bromide under slight pressure in the presence of 0,15 equiv. of zinc and sulphurdioxide in dimethylformamide.
The formula (I):
wherein each of R
2
and R
3
is, same or different, C2-C4 alkyl or the like; or R
2
and R
3
are taken together with the adjacent carbon atom to form a 5 to 8 membered non-aromatic carbocyclic ring; R
4
is C1-C6 alkyl or the like; X is an oxgen atom or a sulfur atom; A is the group of the formula:
wherein R
1
is, same or different, alkyl or the like; W is C2-C6 alkylene which may contain an optionally substituted heteroatom(s) or the like; n is an integer of 0 to 7, a pharmaceutically acceptable salt, or a solvate thereof.
We designed and prepared a trifluoromethylation reagent, N-trifluoromethylsuccinimide (NTFS), and use it for the trifluoromethylation of aromatic amines without metal. This protocol exhibits broad substrate scope and wide functional group compatibility. The synthetic utility of the method is further demonstrated by the improvedsynthesis of the antiasthmatic drug Mabuterol.