Triacetoxyperiodinane → tert-Butyl 4-(4-phenyl-1,3-dioxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate

HRID 8772

反応式

HRID 8772 の反応式
[C:1]1([CH2:7][CH:8]([OH:35])[CH2:9][C:10]([C:12]2([CH2:25][CH2:26][O:27][Si:28]([C:31]([CH3:34])([CH3:33])[CH3:32])([CH3:30])[CH3:29])[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]2)=[O:11])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O>C(Cl)Cl.CCOCC>[C:1]1([CH2:7][C:8](=[O:35])[CH2:9][C:10]([C:12]2([CH2:25][CH2:26][O:27][Si:28]([C:31]([CH3:34])([CH3:33])[CH3:32])([CH3:30])[CH3:29])[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:22])[CH3:23])=[O:19])[CH2:14][CH2:13]2)=[O:11])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

参加物

5

反応物 2

HCID 159087TriacetoxyperiodinaneHCID 21983965tert-Butyl 4-(4-phenyl-3-hydroxy-1-oxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate

生成物 1

HCID 21983978tert-Butyl 4-(4-phenyl-1,3-dioxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate収率 69.5%

試薬・触媒・溶媒 2

HCID 3283Diethyl Ether溶媒HCID 6344Dichloromethane溶媒

実験手順

To a solution of tert-butyl 4-(4-phenyl-3-hydroxy-1-oxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate (494 mg, 0.98 mmol) from Step F in methylene chloride (10 mL) at room temperature was added Dess-Martin reagent (621 mg, 1.5 mmol). After 3 h, the reaction was diluted with ether and quenched with 1N sodium hydroxide. After stirring for 30 min, the mixture was diluted with water and extracted twice with ether. The combined organic layers were washed with brine, dried over sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography (10% ethyl acetate in hexanes) to afford the title product (343 mg).

後処理

  1. customquenched with 1N sodium hydroxide
  2. additionthe mixture was diluted with water
  3. extractionextracted twice with ether
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by flash chromatography (10% ethyl acetate in hexanes)

出典と根拠

ORDレコード
ord-0ad6df59fec94b07b829b6f097e8956d
出典データセット
uspto-grants-2006_08
特許番号
US07091211B2

関連ノート

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