反应详情

温度

110 °C

A mixture of 1,3-dichloro-5-(1-trifluoromethyl-vinyl)-benzene (preparation described in, for example, EP 1,731,512) (8.03 g), 1-bromo-4-isocyanomethyl-2-methyl-benzene (Example 10.3) (4.16 g) and copper(I) oxide (0.13 g) in toluene (50 ml) was stirred at 110° C. for 16 hours. The reaction mixture was concentrated and the residue purified by chromatography on silica gel (eluent: ethyl acetate/heptane) to give 2-(4-bromo-3-methyl-phenyl)-4-(3,5-dichloro-phenyl)-4-trifluoromethyl-3,4-dihydro-2H-pyrrole (2.39 g). 1H-NMR (400 MHz, CDCl3): 7.39-6.86 (m, 7H), 5.39-4.98 (m, 1H), 3.24-2.77 (m, 1H), 2.35 (m, 3H), 2.32-2.09 (m, 1H) ppm.

1. concentrationThe reaction mixture was concentrated
2. customthe residue purified by chromatography on silica gel (eluent: ethyl acetate/heptane)