Trifluoroacetic acid → 8-(1-Hydroxy-3-(4-methyl-1-oxo-1,3-dihydroisobenzofuran-5-yl)propan-2-yl)-2-(4-methyl-5-oxo-2,5-dihydrofuran-3-yl)-2,8-diazaspiro[4.5]decan-1-one

Participants

Reaction Steps

To a solution of 8-(1-((tert-butyldimethylsilyl)oxy)-3-(4-methyl-1-oxo-1,3-dihydro isobenzofuran-5-yl)propan-2-yl)-2-(4-methyl-5-oxo-2,5-dihydrofuran-3-yl)-2,8-diazaspiro[4.5]decan-1-one (0.10 g, 0.18 mmol) in DCM (3 mL) was added trifluoroacetic acid (3 mL) at 0° C. After stirring at room temperature for 24 h, solvent was removed under reduced pressure and the residue was purified by preparative-HPLC to give the title compound, which was separated by SFC chiral chromatography into two single enantiomers Isomer A (faster elting) and Isomer B (slower eluting. Column: CHIRALPAK AD 250×30 mm I.D., 20 μm; Mobile phase: Supercritical CO2/EtOH (0.2% NH3H2O)=45/55; Flow rate: 80 ml/min. For both isomers: LC-MS (ESI, m/z): 455 [M+1].

Provenance & Evidence