Ethyl Acetate → (2S, 6RS)-4-(4-chloro-quinolin-7-ylmethyl)-2,6-dimethyl-3-oxo-piperazine-1-carboxylic acid benzyl ester

HRID 1432908ノート

反応式

HRID 1432908 の反応式
[CH2:1]([O:8][C:9]([N:11]1[CH:16]([CH3:17])[CH2:15][NH:14][C:13](=[O:18])[C@@H:12]1[CH3:19])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].Br[CH2:23][C:24]1[CH:33]=[C:32]2[C:27]([C:28]([Cl:34])=[CH:29][CH:30]=[N:31]2)=[CH:26][CH:25]=1.C(OCC)(=O)C>C1COCC1.CN(C=O)C>[CH2:1]([O:8][C:9]([N:11]1[CH:16]([CH3:17])[CH2:15][N:14]([CH2:23][C:24]2[CH:33]=[C:32]3[C:27]([C:28]([Cl:34])=[CH:29][CH:30]=[N:31]3)=[CH:26][CH:25]=2)[C:13](=[O:18])[C@@H:12]1[CH3:19])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

参加物

7

反応物 4

HCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 217084447-Bromomethyl-4-chloroquinolineHCID 57066025(2S,6RS)-2,6-Dimethyl-3-oxo-piperazine-1-carboxylic acid benzyl ester

生成物 1

HCID 57069199(2S, 6RS)-4-(4-chloro-quinolin-7-ylmethyl)-2,6-dimethyl-3-oxo-piperazine-1-carboxylic acid benzyl ester収率 95.2%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

(2S,6RS)-2,6-Dimethyl-3-oxo-piperazine-1-carboxylic acid benzyl ester (380 mg, 1.45 mmol) is dissolved in 10 mL of THF and 1 mL of DMF. Sodium hydride (60%, 72 mg, 3.14 mmol) is added at 0° C. and left to stir at room temperature for thirty minutes before 7-bromomethyl-4-chloro-quinoline (257 mg, 1.0 mmol) is added. The reaction is stirred for four hours. Ethyl acetate is added to the mixture, and the reaction is quenched with 3 mL of H2O. The two layers are separated and ethyl acetate (2×30 ml) is used to extract before dried over magnesium sulfate. The residue after filtration and concentration is chromatographed on silica gel (60% EtOAc/Hexane) to give (2S, 6RS)-4-(4-chloro-quinolin-7-ylmethyl)-2,6-dimethyl-3-oxo-piperazine-1-carboxylic acid benzyl ester (417 mg, 95% yield). C22H20ClN3O3 MS m/z: 438, 440.

後処理

  1. waitleft
  2. additionis added
  3. customthe reaction is quenched with 3 mL of H2O
  4. customThe two layers are separated
  5. extractionto extract
  6. dry with materialbefore dried over magnesium sulfate
  7. filtrationThe residue after filtration and concentration
  8. customis chromatographed on silica gel (60% EtOAc/Hexane)

出典と根拠

ORDレコード
ord-ce0dc56101e6415d9fcf59d7ead7b5d2
出典データセット
uspto-grants-2009_11
特許番号
US07612075B2

反応ノート

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