Mild and General Conditions for the Cross-Coupling of Aryl Halides with Pentafluorobenzene and Other Perfluoroaromatics
摘要:
New reaction conditions are described that enable the direct arylation of pentafluorobenzene with sterically encumbered aryl bromides and aryl chlorides. These reactions occur in high yield and under mild conditions. Notably, the reactions can be performed at 80 C in isopropyl acetate with a catalyst generated by the in situ mixing of Pd(OAc)(2) and S-Phos. The enhanced scope of these transformations should further reduce the need to use pentafluorophenylboronic acid in the construction of perfluoroarenes.
Perfluororganotellur-verbindungen: die synthesen von C6F5TeTeC6F5, Hg(TeC6F5)2, CF3TeTeC6F5, CF3TeC6F5 und pentafluorphenylfuranen [1]
作者:Reiner Kasemann、Dieter Naumann
DOI:10.1016/s0022-1139(00)80433-9
日期:1990.6
the three new furan derivatives 2- and 3-pentafluorophenylfuran and 2,5-dihydro-2-pentafluorophenylfuran are prepared by irradiating a mixture of Te(C6F5)2 and furan. Te2(C6F5)2 reacts with elemental mercury to yield Hg(TeC6F5)2. From the reactions of Tex(CF3)2 with Tex(C6F5)2 (x = 1,2) equilibria are formed with the unsymmetrical compounds CF3TexC6F5. The syntheses, NMR, and mass spectra of these
通过辐射Te(C 6 F 5)的混合物来制备双(五氟苯基)二碲Te 2(C 6 F 5)2和三种新的呋喃衍生物2-和3-五氟苯基呋喃和2,5-二氢-2-五氟苯基呋喃。2,呋喃。Te 2(C 6 F 5)2与元素汞反应生成Hg(TeC 6 F 5)2。根据Te x(CF 3)2与Te x(C 6 F 5)的反应用不对称化合物CF 3 Te x C 6 F 5形成2(x = 1,2)平衡。描述了这些新化合物的合成,NMR和质谱。
KASEMANN, REINER;NAUMANN, DIETER, J. FLUOR. CHEM., 48,(1990) N, C. 207-217