2,2,2-Trifluoroethyl trifluoromethanesulfonate → [10-(1-Hydroxy-1-methyl-ethyl)-8-(2,2,2-trifluoroethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone

Participants

Reaction Conditions

Reaction Steps

(2-(2-Hydroxypropan-2-yl)-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)(4-isopropoxy-3-methylphenyl)methanone (25 mg, 0.06 mmol) was dissolved in dry ethanol (300 μL) and NaHCO3 (50 mg, 0.60 mmol) and 2,2,2-trifluoroethyl trifluoromethanesulfonate (20 μL, 0.13 mmol) were added and the reaction mixture was heated at 80° C. for 16 hours. The reaction mixture was filtered, concentrated in vacuo and purified by silica gel column chromatography using 0-100% EtOAc/hexanes as eluent to give [10-(1-hydroxy-1-methyl-ethyl)-8-(2,2,2-trifluoroethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone (15 mg, 53%) as a colorless oil. ESI-MS m/z calc. 472.5. found 473.5 (M+1)+; Retention time: 1.93 minutes (3 min run).

Provenance & Evidence