反应详情

A diasteromeric mixture of tert-butyl 1-((2R)-3-(benzyloxy)-1-(2-(2-(dimethylamino)-2-oxoethyl)-1-oxo-4-phenyl-2,7-diazaspiro[4.5]decan-7-yl)-1-oxopropan-2-ylamino)-2-methyl-1-oxopropan-2-ylcarbamate (386 mg; 0.569 mmol) was solubilised in dichloromethane (3 ml) at room temperature. Trifluoroacetic acid (439 ul; 5.69 mmol) was added and mixture stirred at RT for 72 hours. The solvent was removed in vacuo and the crude product was dissolved in methanol and loaded onto a pre-wetted 10 g SCX-2 cartridge. Methanol (50 ml) was passed through the cartridge and the product was eluted with 2M NH3 in methanol. Concentration of the ammonia fraction afforded the title compound as a diastereomeric mixture. Diastereomers were separated by chiral SFC, collecting the second peak.

1. customThe solvent was removed in vacuo
2. dissolutionthe crude product was dissolved in methanol
3. washthe product was eluted with 2M NH3 in methanol