1,3-Dichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene → 2-(4-bromo-3-methyl-phenyl)-4-(3,5-dichloro-phenyl)-4-trifluoromethyl-3,4-dihydro-2H-pyrrole

Participants

Reaction Conditions

Reaction Steps

A mixture of 1,3-dichloro-5-(1-trifluoromethyl-vinyl)-benzene (8.03 g) (made as described in EP 1,731,512), 1-bromo-4-isocyanomethyl-2-methyl-benzene (Example I3) (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.

Provenance & Evidence