戴斯-马丁氧化剂 → tert-Butyl 4-(4-phenyl-1,3-dioxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate

HRID 8772

反应方程式

HRID 8772 反应方程式
[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

参与物

5

反应物 2

HCID 159087戴斯-马丁氧化剂HCID 21983965tert-Butyl 4-(4-phenyl-3-hydroxy-1-oxobut-1-yl)-4-(2-(tert-butyldimethylsilyloxy)eth-1-yl)piperidine-1-carboxylate

产物 1

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

试剂、催化剂与溶剂 2

HCID 3283乙醚溶剂HCID 6344二氯甲烷溶剂

实验过程

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).

后处理

  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)

来源与证据

ORD记录
ord-0ad6df59fec94b07b829b6f097e8956d
来源数据集
uspto-grants-2006_08
专利号
US07091211B2

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