Sodium periodate → tert-Butyl {1-[2-(6-methoxy-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]-2-oxopiperidin-4-yl}carbamate

HRID 255278

反応式

HRID 255278 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[O:11][CH2:10][C:9](=[O:12])[N:8]([CH2:13][CH2:14][N:15]3[CH2:20][CH2:19][CH:18]([NH:21][C:22](=[O:28])[O:23][C:24]([CH3:27])([CH3:26])[CH3:25])[CH2:17][CH2:16]3)[C:7]=2[CH:29]=1.I([O-])(=O)(=O)=[O:31].[Na+]>O.C(OCC)(=O)C.C(OCC)(=O)C.O.[Ru](=O)=O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[O:11][CH2:10][C:9](=[O:12])[N:8]([CH2:13][CH2:14][N:15]3[CH2:16][CH2:17][CH:18]([NH:21][C:22](=[O:28])[O:23][C:24]([CH3:26])([CH3:25])[CH3:27])[CH2:19][C:20]3=[O:31])[C:7]=2[CH:29]=1

参加物

6

反応物 2

HCID 23667635Sodium periodateHCID 56834481tert-Butyl {1-[2-(6-methoxy-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]piperidine-4-yl}carbamate2 回

生成物 1

HCID 86642633tert-Butyl {1-[2-(6-methoxy-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]-2-oxopiperidin-4-yl}carbamate収率 25%

試薬・触媒・溶媒 3

HCID 16211523Ruthenium dioxide hydrate触媒HCID 8857Ethyl Acetate溶媒HCID 22728543Water ethylacetate溶媒

実験手順

A mixture of tert-butyl {1-[2-(6-methoxy-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]piperidin-4-yl}carbamate (Intermediate 47, 1.39 g, 3.4 mmol) in water/ethyl acetate (40 mL, 4:1) was treated with sodium periodate (2.8 g, 21.4 mmol) and ruthenium (IV) oxide hydrate (50 mg, 0.34 mmol) at room temperature. After 53 hours, the reaction was diluted with ethyl acetate, the aqueous phase was extracted with ethyl acetate (6×25 mL), and the combined organic layers were mixed with 2-propanol (20 mL) and stirred for 2 hours at room temperature. The reaction mixture was then filtered through celite, dried over sodium sulfate, and concentrated in vacuo. Chromatography on silica gel with dichloromethane/methanol (95:5) gave 350 mg (25%) of the product as a colorless solid.

後処理

  1. extractionthe aqueous phase was extracted with ethyl acetate (6×25 mL)
  2. additionthe combined organic layers were mixed with 2-propanol (20 mL)
  3. filtrationThe reaction mixture was then filtered through celite
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-bacf811709b04c2b842993bbc11a01b8
出典データセット
uspto-grants-2011_01
特許番号
US07875715B2

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