反应详情

A mixture of 4-benzyl-2-phenyl-1-oxa-4,9-diazaspiro[5.5]undecane (222 mg, 0.69 mmol), 4-isopropoxy-3-methyl-benzoic acid (140 mg, 0.72 mmol) and HATU (262 mg, 0.69 mmol) was stirred in a mixture of DCM (1 mL) and DMF (1 mL) for 5 minutes. Triethylamine (192 μL, 1.38 mmol) was added and the reaction mixture was stirred for 16 hours, then concentrated in vacuo, diluted with sat. aq. NaHCO3, extracted with ethyl acetate (3×2 mL), dried over MgSO4, filtered and concentrated in vacuo and purified by silica gel column chromatography using 0-60% EtOAc/DCM as eluent to give (10-benzyl-8-phenyl-7-oxa-3,10-diazaspiro[5.5]undecan-3-yl)-(4-isopropoxy-3-methyl-phenyl)methanone (343 mg, 100%) as a yellow oil. ESI-MS m/z calc. 406.5. Found 407.7 (M+1)+; Retention time: 1.13 minutes (3 min run).

1. concentrationconcentrated in vacuo
2. additiondiluted with sat. aq. NaHCO3
3. extractionextracted with ethyl acetate (3×2 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. custompurified by silica gel column chromatography