2,4-Difluoroaniline → [2-Chloro-4-(2,4-difluoro-phenylamino)-phenyl]-(2-methyl-5-nitro-phenyl)-methanone

関与物質

反応条件

反応手順

Compound 492 (5.4 g, 15.2 mmol) was dissolved in dry 1,4-dioxan (150 mL) in a 200 mL screw cap vessel. 2,4-Difluoroaniline (1.7 mL, 16.7 mmol) was added and argon was blown over the mixture. Cs2CO3 (14.9 g, 45.7 mmol), BINAP (0.38 g, 0.6 mmol) and Pd(OAc)2 (0.14 g, 0.6 mmol) were added and argon was blown through the mixture and the screw cap vessel was closed. The mixture was stirred at 100° C. for 7 h. The reaction mixture was poured into H2O (100 mL) and EtOAc (200 mL). The water phase was extracted with EtOAc (×3) and the combined organic phases were washed with brine, dried (MgSO4), filtered and concentrated in vacuo. The crude product was purified by flash chromatography using CH2Cl2/petroleum ether (40-60) 2:3→1:1→1:0 followed by EtOAc as the eluent to afford the title compound as a yellow crystalline compound.

情報源と証拠