Реакция #160215

Уравнение реакции

Iodoethane

ammonium formate

[8-benzyl-10-(hydroxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone hydrochloride salt

sodium hydride

→

[10-(ethoxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone

Выход 74.0%

Растворители

EtOAc

methanol

DMF

Условия реакции

Обработка

1. 1
   workup.STIRRINGthe reaction mixture was stirred for 3 hours
2. 2
   Фильтрацияfiltered
3. 3
   Концентрированиеconcentrated in vacuo
4. 4
   ДругоеThe residue was purified by silica gel column chromatography
5. 5
   Другоеto give the ether intermediate as pale yellow oil
6. 6
   ФильтрацияThe reaction mixture was filtered
7. 7
   Концентрированиеconcentrated in vacuo
8. 8
   workup.ADDITIONdiluted with ethyl acetate
9. 9
   Промывкаwashed with 1:1 3M NaOH/
10. 10
    Сушкаaq. NaHCO3, dried over MgSO4
11. 11
    Фильтрацияfiltered
12. 12
    Концентрированиеconcentrated in vacuo

Методика

To [8-benzyl-10-(hydroxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone hydrochloride salt (43 mg, 0.09 mmol) in DMF (0.5 mL) was added sodium hydride (11 mg, 0.30 mmol) and the reaction mixture was stirred for 20 minutes. Iodoethane (30 μL, 0.38 mmol) was added and the reaction mixture was stirred for 3 hours, then diluted with EtOAc, filtered, concentrated in vacuo. The residue was purified by silica gel column chromatography using 10-100 EtOAc/hexanes eluent to give the ether intermediate as pale yellow oil. The oil was dissolved in methanol (0.6 mL), and Pd (5 mg, 0.004 mmol) and ammonium formate (27 mg, 0.44 mmol) were added and the reaction mixture was heated at 75° C. for 40 minutes. The reaction mixture was filtered, concentrated in vacuo, diluted with ethyl acetate, washed with 1:1 3M NaOH/sat. aq. NaHCO3, dried over MgSO4, filtered and concentrated in vacuo to give [10-(ethoxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl]-(4-isopropoxy-3-methyl-phenyl)methanone (25 mg, 74%) as a pale yellow oil. ESI-MS m/z calc. 390.5. Found 391.3 (M+1)+; Retention time: 1.17 minutes (3 min run).

Источник