Water → Benzyl 3-(hydroxymethyl)piperidine-1-carboxylate

HRID 892244ノート

反応式

HRID 892244 の反応式
C([O:3][C:4]([C@@H:6]1[CH2:11][CH2:10][CH2:9][N:8]([C:12]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[O:13])[CH2:7]1)=O)C.[H-].[Al+3].[Li+].[H-].[H-].[H-].O.[OH-].[Na+]>C1COCC1>[CH2:15]([O:14][C:12]([N:8]1[CH2:9][CH2:10][CH2:11][CH:6]([CH2:4][OH:3])[CH2:7]1)=[O:13])[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

参加物

6

反応物 4

HCID 962Water2 回HCID 14798Sodium HydroxideHCID 16091193(R)-1-Benzyl 3-ethyl piperidine-1,3-dicarboxylateHCID 21226445Aluminium lithium hydride

生成物 1

HCID 2776577Benzyl 3-(hydroxymethyl)piperidine-1-carboxylate収率 66%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

Piperidine-1,3-dicarboxylic acid 1-benzyl ester 3-ethyl ester (7) (1.5 g, 5.83 mmol) was dissolved in 5.8 mL of anhydrous THF, and the reaction was stirred under N2 at −5° C. while lithium aluminum hydride dissolved in THF (7.0 mL, 1.0M) was added dropwise by addition funnel over 30 minutes. When the reaction was complete by TLC (10 min.), H2O (0.6 mL), then 10% NaOH (1.5 mL), then H2O (0.6 mL) were added, and the reaction was stirred for about 45 minutes. The salts were removed by filtration and the solution was dried with sodium sulfate, filtered, and concentrated. The crude material was purified using an ISCO CombiFlash flash column (silica, 80:20 Hexane:EtOAc to 40:60 Hexane:EtOAc) to achieve 1.24 g of pure 8 (66% yield).

後処理

  1. additionwas added dropwise by addition funnel over 30 minutes
  2. customThe salts were removed by filtration
  3. dry with materialthe solution was dried with sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude material was purified

出典と根拠

ORDレコード
ord-3808c397ff4d4bf28619167b1e3c1e07
出典データセット
uspto-grants-2006_02
特許番号
US07005524B2

反応ノート

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