1-(3,5-dichlorophenyl)ethanone

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A reaction vessel was charged with sodium hydride (as a 60% oil dispersion, 5.52 g, 138 mmol), DME (23 ml) and 2-chloro-5-trifluoromethylpyridine (7.06 g, 42 mmol). 3,5-Dichloroacetophenone (8.3 g, 44 mmol) in DME (23 ml) was added in portions to the mixture under nitrogen at room temperature. The mixture was stirred at ambient temperature for one hour then at 40-45° C. overnight. Upon completion of the reaction, the mixture was cooled to 5° C. and 10% aqueous sodium hydroxide solution (23 ml) was slowly added to the reaction mixture followed by methanol (46 ml) then hydroxylamine hydrochloride (14.5 g, 210 mmol). The mixture was heated to 72° C. for 4 hours then cooled and diluted with water (1500 ml) with stirring. The resulting solid was removed by filtration and dried under vacuum. It was then slurried in cyclohexane (100 ml) then filtered, washing with further cyclohexane. The crude solid 13.30 g (86%) was used in subsequent reactions without further purification. at 40-45° C. overnight Upon completion of the reaction the mixture was cooled to 5° C. The mixture was heated to 72° C. for 4 hours then cooled with stirring The resulting solid was removed by filtration dried under vacuum then filtered washing with further cyclohexane The crude solid 13.30 g (86%) was used in subsequent reactions without further purification

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The phenacyl bromide intermediate for the above-mentioned styrene oxide is prepared by brominating 10 g of 3,5-dichloroacetophenone in 50 ml of CHCl3 /50 ml of EtOAc with 23.6 g of CuBr2. The mixture is heated at reflux for 2.5 hours and cooled to room temperature. After stirring for 16 hours at room temperature, the mixture is cooled in ice for 2 hours and filtered. The filter cake is washed with 50 ml of CHCl3 and the combined filtrates are twice decolorized with activated carbon, filtered, and evaporated to dryness in vacuo to afford the orange oil of the 3,5-dichlorostyrene oxide. The mixture is heated at reflux for 2.5 hours the mixture is cooled in ice for 2 hours filtered The filter cake is washed with 50 ml of CHCl3 filtered evaporated to dryness in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The phenacyl bromide intermediate for the above-mentioned styrene oxide is prepared by brominating 10 g of 3,5-dichloroacetophenone in 50 ml of CHCl3 /50 ml of EtOAc with 23.6 g of CuBr2. The mixture is heated at reflux for 2.5 hours and cooled to room temperature. After stirring for 16 hours at room temperature, the mixture is cooled in ice for 2 hours and filtered. The filter cake is washed with 50 ml of CHCl3 and the combined filtrates are twice decolorized with activated carbon, filtered, and evaporated to dryness in vacuo to afford the orange oil of the 3,5-dichlorostyrene oxide. The mixture is heated at reflux for 2.5 hours the mixture is cooled in ice for 2 hours filtered The filter cake is washed with 50 ml of CHCl3 filtered evaporated to dryness in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The phenacyl bromide intermediate for the above-mentioned styrene oxide is prepared by brominating 10 g of 3,5-dichloroacetophenone in 50 ml of CHCl3 /50 ml of EtOAc with 23.6 g of CuBr2. The mixture is heated at reflux for 2.5 hours and cooled to room temperature. After stirring for 16 hours at room temperature, the mixture is cooled in ice for 2 hours and filtered. The filter cake is washed with 50 ml of CHCl3 and the combined filtrates are twice decolorized with activated carbon, filtered, and evaporated to dryness in vacuo to afford the orange oil of the 3,5-dichlorostyrene oxide. The mixture is heated at reflux for 2.5 hours the mixture is cooled in ice for 2 hours filtered The filter cake is washed with 50 ml of CHCl3 filtered evaporated to dryness in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared by Method A using 3,5-dichloroacetophenone (2 g, 10.58 mmol), trimethylsilyl triflate (2.35 g, 10.58 mmol), triethylamine (2.14 g, 21.16 mmol), methylene chloride (20 mL), and diethyl ester of [(2-isopropylphenyl)thio]propanedioic acid (1.64 g, 5.29 mmol). Isolated yield: 70% m.p.168-169° C.; 1H NMR (400 MHz, DMSO-d6) δ 1.25 (d, 6H), 3.42 (m, 1H), 6.92 (d, 1H), 7.01 (s, 1H), 7.06 (t, 1H), 7.13 (t, 1H), 7.28 (d, 1H), 7.83 (m, 1H), 7.88 (m, 2H). Isolated yield: 70% m.p.168-169° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared by Method A using 3,5-dichloroacetophenone (2 g, 10.58 mmol), trimethylsilyl triflate (2.35 g, 10.58 mmol), triethylamine (2.14 g, 21.16 mmol), methylene chloride (20 mL), and diethyl ester of [(2-isopropylphenyl)thio]propanedioic acid (1.64 g, 5.29 mmol). Isolated yield: 70% m.p.168-169° C.; 1H NMR (400 MHz, DMSO-d6) δ 1.25 (d, 6H), 3.42 (m, 1H), 6.92 (d, 1H), 7.01 (s, 1H), 7.06 (t, 1H), 7.13 (t, 1H), 7.28 (d, 1H), 7.83 (m, 1H), 7.88 (m, 2H). Isolated yield: 70% m.p.168-169° C.