反应详情

1.15 ml of dimethyl sulfoxide are added at −60° C. in the course of 5 minutes to 0.63 ml of oxalyl chloride in 50 ml of dichloromethane. After 40 minutes, a solution of 3.4 g of 1-[2,6-dichloro-4-(3,3-dichloro-allyloxy)-phenoxy]-3-(4-trifluoromethyl-phenoxy)-propan-2-ol in 30 ml of dichloromethane is added dropwise in the course of 10 minutes. After 40 minutes, 4.5 ml of triethylamine are added and the reaction mixture is slowly heated to room temperature. The reaction mixture is then poured into water and extracted with dichloromethane. After concentration of the organic phase and crystallisation from diethyl ether/hexane, 1-[2,6-dichloro-4-(3,3-dichloro-allyloxy)-phenoxy]-3-(4-trifluoromethyl-phenoxy)-propan-2-one is obtained. 1H-NMR (CDCl3) 300 MHz: 4.61 (d, 2H), 4.74 (s, 2H), 5.21 (s, 2H), 6.12 (t, 1H), 6.90 (s, 2H), 7.11 (d, 2H), 7.59 (d, 2H)

1. waitAfter 40 minutes
2. extractionextracted with dichloromethane
3. customAfter concentration of the organic phase and crystallisation from diethyl ether/hexane