English to French Science Chemistry; Chem Sci/Eng In a patent chemistry, chromatography

The rac-cis/trans benzyl 5-((tert-butoxycarbonyl)amino)-2-methylpiperidine-1-carboxylate (44 g) was separated by chiral SFC to give rac-cis -(2S,5R)-benzyl 5-((tert-butoxycarbonyl)amino)-2-methylpiperidine-1-carboxylate (Peak 2, 24.5 g, 55.68%) and rac-trans - (2S,5S)-benzyl 5-((tert-butoxycarbonyl)amino)-2-methylpiperidine-1-carboxylate_(Peak 1, 12.3 g, 27.95%). Peak 2, cis material was
carried on to Boc removal. Prep SFC Column : ChiralCel OD 300mmx50mm, 10 mm; Mobile phase: A: Supercritical CO2 , B: IPA (0.1%NH3H2O), A:B =85:15 at 180ml/min; Column Temp: 38 °C; Nozzle Pressure: 100Bar; Nozzle Temp: 60 °C; Evaporator Temp: 20 °C; Trimmer Temp: 25 °C; Wavelength: 220nm

Separation conditions: Instrument: SFC 350; Column: AS 250mmx50mm,10 mm; Mobile phase: A: Supercritical CO2, B: EtOH (0.05%DEA) , A:B =65:35 at 240ml/min; Column Temp: 38 °C; Nozzle Pressure: 100Bar; Nozzle Temp: 60 °C; Evaporator Temp: 20 °C; Trimmer Temp: 25 °C; Wavelength: 220nm.