反応式
CS(C)=O.C(Cl)(=O)C(Cl)=O.[CH3:11][C:12]([CH3:23])([CH2:15][O:16][CH:17]1[CH2:22][CH2:21][CH2:20][CH2:19][O:18]1)[CH2:13][OH:14].C(N(CC)CC)C.[NH4+].[Cl-]>ClCCl>[CH3:11][C:12]([CH3:23])([CH2:15][O:16][CH:17]1[CH2:22][CH2:21][CH2:20][CH2:19][O:18]1)[CH:13]=[O:14]参加物
反応条件
- 温度
- -78 °C
実験手順
DMSO (2.69 mL, 50.97 mmol) was added dropwise to a solution of oxalyl chloride (2.87 mL, 33.98 mmol) in dichloromethane (85.0 mL) at −78° C. After several minutes, neat 2,2-dimethyl-3-(tetrahydro-pyran-2-yloxy)-propan-1-ol (3.2 g, 16.99 mmol) was added dropwise and after stirring for 1 h at −78° C., triethylamine (9.5 mL, 68.0 mmol) was added. The reaction was allowed to warm to room temperature and stirred for 30 min. Sat. NH4Cl was added and the organic layer was separated. The aqueous layer was extracted with ethyl acetate and washed with brine. The organic layers were combined, dried over Na2SO4 and concentrated to give a pale liquid. The crude liquid was passed through a short silica gel column and eluted with 50% ethyl acetate in hexanes to provide 2,2-dimethyl-3-(tetrahydro-pyran-2-yloxy)-propionaldehyde (3.09 g, 97%) as a pale liquid after removal of solvents under reduced pressure.
後処理
- waitAfter several minutes
- temperatureto warm to room temperature
- stirringstirred for 30 min
- customthe organic layer was separated
- extractionThe aqueous layer was extracted with ethyl acetate
- washwashed with brine
- dry with materialdried over Na2SO4
- concentrationconcentrated
- customto give a pale liquid
- washeluted with 50% ethyl acetate in hexanes
出典と根拠
- ORDレコード
- ord-20da1a9063e842bd9d058a0d784b622f
- 出典データセット
- uspto-grants-2013_10
- 特許番号
- US08569302B2
関連ノート
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