Ammonium Chloride → (4-Bromo-2-chloro-phenyl)-(2-methyl-5-nitro-phenyl)-methanone

Participants

Reaction Conditions

Reaction Steps

The reaction was run under an argon atmosphere using dry glassware. 4-Bromo-2-chloroiodobenzene (25.5 g, 80.9 mmol) was dissolved in dry THF (400 mL) and cooled to −60° C. Isopropylmagnesium chloride (2 M in THF, 40.4 mL, 80.9 mmol) was added under stirring during 30 minutes. The reaction mixture was allowed to warm up to −40° C. and the mixture was stirred at −40° C. for 4 h. Compound 491 (22.2 g, 80.9 mmol) was added and the mixture was stirred at −40° C. for 3 h after which it was allowed to warm to room temperature and stirred for 17 h. A saturated aqueous solution of NH4Cl (200 mL) was added and the mixture was stirred for 1 h. The phases were separated and the aqueous phase was extracted with Et2O (4×100 mL). 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 as the eluent to afford the title compound as yellow crystalline compound.

Provenance & Evidence