1: (3,4,5-trifluorophenyl)magnesium bromide With zinc(II) chloride in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=30°C; 0.166667 h; 2: RR 265 With PEPPSI™-IPr catalyst in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=25 - 50°C; 6 h;

triethylsilane; zinc in methanol T=20°C; 0.333333 h; Inert atmosphere; chemoselective reaction;

Multi-step reaction with 2 steps 2: aqueous NaOH-solution