反应详情

温度

-78 °C

To (8-benzyl-10-vinyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-(4-isopropoxy-3-methyl-phenyl)methanone (135 mg, 0.30 mmol) in DCM (4 mL) and methanol (1 mL) at −78° C. was bubbled ozone until the solution turned faint blue. NaBH4 (91 mg, 2.41 mmol) and methanol (˜2 mL) was added under an atmosphere of nitrogen and the reaction mixture was stirred at −78° C. for 30 minutes, then at 0° C. for 1 hour. The reaction mixture was concentrated in vacuo, quenched with 4N HCl/dioxane, concentrated in vacuo, then diluted with methanol-water (1:1), microfiltered and purified by prep LCMS (1-99% ACN/Water, 5 mM HCl modifier) to give [8-benzyl-10-(hydroxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone (50 mg, 34%). ESI-MS m/z calc. 452.6. found 453.5 (M+1)+; Retention time: 1.18 minutes (3 min run).

1. waitat 0° C. for 1 hour
2. concentrationThe reaction mixture was concentrated in vacuo
3. customquenched with 4N HCl/dioxane
4. concentrationconcentrated in vacuo
5. additiondiluted with methanol-water (1:1)
6. custommicrofiltered and purified by prep LCMS (1-99% ACN/Water, 5 mM HCl modifier)