Sodium Bicarbonate → 4-Pyridinecarboxylic acid, 2,3,4,5-tetrahydro-6-methoxy-, ethyl ester

HRID 2047638ノート

反応式

HRID 2047638 の反応式
[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][NH:9][C:8](=[O:12])[CH2:7]1)=[O:5])[CH3:2].F[B-](F)(F)F.[CH3:18][O+](C)C.C(=O)(O)[O-].[Na+]>ClCCl>[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][N:9]=[C:8]([O:12][CH3:18])[CH2:7]1)=[O:5])[CH3:2]

参加物

5

反応物 3

HCID 516892Sodium BicarbonateHCID 2735153Oxonium, trimethyl-, tetrafluoroborate(1-) (1:1)HCID 18699051Ethyl 2-oxopiperidine-4-carboxylate

生成物 1

HCID 672974184-Pyridinecarboxylic acid, 2,3,4,5-tetrahydro-6-methoxy-, ethyl ester

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
0 °C

実験手順

Add 2-oxopiperidine-4-carboxylic acid ethyl ester (6.0 g, 35 mmol) to a solution of trimethyloxonium tetrafluoroborate (9.0 g, 59.6 mmol) in dichloromethane (78 mL) cooled to 0° C. Stir the reaction for 3 hours and pour into an ice cold solution of saturated aqueous sodium bicarbonate. Separate layers and extract the aqueous layer with additional dichloromethane. Combine the organic layers, dry over anhydrous sodium sulfate, filter, and concentrate under reduced pressure to afford the title compound which was used without further purification (5.87 g, 90%). Mass spectrum (m/z): 186 (M+1).

後処理

  1. customthe reaction for 3 hours
  2. extractionSeparate layers and extract the aqueous layer with additional dichloromethane
  3. dry with materialdry over anhydrous sodium sulfate
  4. filtrationfilter
  5. concentrationconcentrate under reduced pressure

出典と根拠

ORDレコード
ord-16b0ec4e9c0946c99df2d2b2cdf2ec10
出典データセット
uspto-grants-2013_11
特許番号
US08592590B2

反応ノート

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