1298101-47-9

The general procedure for the synthesis of tert-butyl ((1S,3R)-3-aminocyclohexyl)carbamate from benzyl ((1R,3S)-cyclohexane-1,3-diyl)dicarbamate (dextro) was as follows: to tert-butyl ((1S,3R)-3-(benzyloxycarbonylamino)cyclohexylcarbamate (10 g, 28.4 mmol) in EtOH (473 mL) A 10% w/w Pd/C (450 mg) was added to the degassed solution. The reaction mixture was stirred under H2 (1 atm) atmosphere for 5 hours. Upon completion of the reaction, the mixture was filtered through a Celite pad (and washed with EtOH) and the filtrate was concentrated under reduced pressure to afford tert-butyl ((1S,3R)-3-aminocyclohexyl)carbamate (6.08 g, 28.4 mmol, 100% yield) as a white solid.

[1] Patent: WO2015/58140, 2015, A1. Location in patent: Paragraph 00310
[2] Patent: WO2015/154039, 2015, A2. Location in patent: Paragraph 248; 249; 446; 447
[3] Patent: WO2016/58544, 2016, A1. Location in patent: Paragraph 165; 166; 375