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Radical reactions O 0195Tris(trimethylsilyl)silane-Promoted Radical Reaction and Electron-Transfer Reaction in Benzotrifluoride. -In the radical reactions, a lesser quantity of benzotrifluoride (BTF) compared to benzene can be used. The electron-transfer reaction in BTF is more effective than in CH2Cl2. The FeCl3-promoted reaction of (Xa) to (XIa) is accelerated by the addition of an imidazolium salt. -(HASEGAWA*, E.; OGAWA, Y.; KAKINUMA, K.; TSUCHIDA, H.; TOSAKA, E.; TAKIZAWA, S.; MURAOKA, H.; SAIKAWA, T.; Tetrahedron 64 (2008) 33, 7724-7728; Dep. Chem., Fac. Sci., Niigata Univ., Ikarashi, Niigata 950-21, Japan; Eng.) -Bartels 49-032