tert-butyl N-(3-bromophenyl)-N-methylcarbamate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 128 g (470 mmol) of tert-butyl 3-bromophenylcarbamate in 800 mL of dimethylformamide, 19 g (475 mmol) of sodium hydride (60% in oil) are added portionwise and the reaction medium is stirred until the evolution of gas has ceased. 29.3 mL (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate and evaporated. 152.5 g (92%) of tert-butyl 3-bromophenyl-N-methylcarbamate are obtained. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 129 g (475 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 mL of dimethylformamide are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29 mL (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate, filtered and evaporated. 115 g (95%) of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate filtered evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 114 g (447 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 ml of DMF are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29.3 ml (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate and evaporated. 115 g of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained in a yield of 95%. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 114 g (447 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 ml of DMF are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29.3 ml (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate and evaporated. 115 g of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained in a yield of 95%. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 114 g (447 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 ml of DMF are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29.3 ml (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-water and extracted with ethyl acetate. The organic phase is separated out by settling of the phases, dried over magnesium sulfate and evaporated. 115 g of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained in a yield of 95%. stirring extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 114 g (447 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 ml of DMF are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29.3 ml (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-water and extracted with ethyl acetate. The organic phase is separated out by settling of the phases, dried over magnesium sulfate and evaporated. 115 g of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained in a yield of 95%. stirring extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3.6 g (12.7 mmol) of tert-butyl (3-bromophenyl)-N-methylcarbamate, prepared in a manner analogous to Example 1b), are dissolved in 15 ml of dichloromethane. 5 ml of trifluoroacetic acid are added and the reaction mixture is stirred at ambient temperature for 1 hour. The reaction is halted by the addition of 50 ml of a saturated sodium hydrogencarbonate solution and then extraction is carried out with ethyl acetate. The organic phases are combined and dried over sodium sulfate. The solvents are evaporated and then the residue is chromatographed on silica gel (heptane/ethyl acetate 50/50). 2.14 g of 3-bromo-N-methylaniline are obtained in the form of an oil. Yield=90%. extraction dried over sodium sulfate The solvents are evaporated the residue is chromatographed on silica gel (heptane/ethyl acetate 50/50)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 128 g (470 mmol) of tert-butyl 3-bromophenylcarbamate in 800 mL of dimethylformamide, 19 g (475 mmol) of sodium hydride (60% in oil) are added portionwise and the reaction medium is stirred until the evolution of gas has ceased. 29.3 mL (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate and evaporated. 152.5 g (92%) of tert-butyl 3-bromophenyl-N-methylcarbamate are obtained. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 129 g (475 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 mL of dimethylformamide are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29 mL (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate, filtered and evaporated. 115 g (95%) of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate filtered evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 114 g (447 mmol) of tert-butyl (3-bromophenyl)carbamate in 800 ml of DMF are added portionwise 19 g (475 mmol) of sodium hydride (60% in oil) and the reaction medium is stirred until the evolution of gas has ceased. 29.3 ml (470 mmol) of methyl iodide are added dropwise and stirring is continued for 18 hours. The reaction medium is poured into ice-cold water and extracted with ethyl acetate. The organic phase is separated out after settling of the phases, dried over magnesium sulfate and evaporated. 115 g of tert-butyl (3-bromophenyl)-N-methylcarbamate are obtained in a yield of 95%. stirring The reaction medium is poured into ice-cold water extracted with ethyl acetate The organic phase is separated out dried over magnesium sulfate evaporated