tert-butyl N-(2-aminoethyl)-N-propan-2-ylcarbamate

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 compound (34.21 g, 82.60 mmol) obtained in step A was dissolved in acetonitrile (300 ml), cesium carbonate (52.38 g, 161 mmol) and benzenethiol (12 ml, 117 mmol) were added and the mixture was stirred at room temperature for one day. The reaction mixture was diluted with water, and the aqueous layer was extracted with dichloromethane. The obtained organic layer was dried over potassium carbonate, the insoluble material was filtered off, and the solution was concentrated under reduced pressure. The obtained oil was dissolved in toluene, and the mixture was extracted with 1N aqueous hydrogensulfate potassium solution. An aqueous sodium hydroxide solution was added to the aqueous layer to give a strong alkaline solution, and the suspending oil was extracted. The aqueous layer was extracted with dichloromethane, mixed with oil and dichloromethane solution, and the mixture was dried over sodium sulfate. The insoluble material was filtered off and the solution was concentrated under reduced pressure to give the title compound as a pale-yellow oil (15.0 g, yield 79%). the aqueous layer was extracted with dichloromethane The obtained organic layer was dried over potassium carbonate the insoluble material was filtered off the solution was concentrated under reduced pressure The obtained oil was dissolved in toluene the mixture was extracted with 1N aqueous hydrogensulfate potassium solution An aqueous sodium hydroxide solution was added to the aqueous layer to give a strong alkaline solution the suspending oil was extracted The aqueous layer was extracted with dichloromethane mixed with oil and dichloromethane solution the mixture was dried over sodium sulfate The insoluble material was filtered off the solution was concentrated under reduced pressure