1: diphenylamine With copper(l) iodide; sodium t-butanolate Inert atmosphere; 2: With N-methyl-2-(methylamino)ethylamine in toluene T=20°C; 0.00833333 h; Inert atmosphere; 3: 1,1-diphenyl-2-bromoethylene in toluene T=140°C; 24 h; Inert atmosphereSealed tube; regioselective reaction;