tert-Butyl 4-formylpiperidine-1-carboxylate → HCID 66934908、化合物

HRID 1798792ノート

反応式

HRID 1798792 の反応式
[Br-].[CH2:2]([O:9][CH2:10][CH2:11][CH2:12][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[CH:42]([CH:44]1[CH2:49][CH2:48][N:47]([C:50]([O:52][C:53]([CH3:56])([CH3:55])[CH3:54])=[O:51])[CH2:46][CH2:45]1)=O>C1COCC1>[CH2:2]([O:9][CH2:10][CH2:11]/[CH:12]=[CH:42]\[CH:44]1[CH2:49][CH2:48][N:47]([C:50]([O:52][C:53]([CH3:54])([CH3:56])[CH3:55])=[O:51])[CH2:46][CH2:45]1)[C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1

参加物

5

反応物 3

HCID 1514430tert-Butyl 4-formylpiperidine-1-carboxylateHCID 2724254Sodium bis(trimethylsilyl)amideHCID 10929077(3-Benzyloxypropyl)triphenylphosphonium bromide

生成物 1

HCID 66934908HCID 66934908、化合物

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
0 °C

実験手順

(3-Benzyloxypropyl)triphenylphosphonium bromide (2.88 g, 5.86 mmol) was suspended in 15 mL THF and cooled to 0° C. Sodium bis(trimethylsily)amide (1M in THF, 5.63 mL, 5.63 mmol) was added dropwise. The mixture turned deep orange. tert-Butyl 4-formylpiperidine-1-carboxylate (1 g, 4.69 mmol) in 3 mL THF was added after 5 minutes. Color faded to slight yellow. The reaction was stirred at room temperature for 1.5 hours, before quenching with saturated aqueous ammonium chloride solution. The aqueous layer was extracted twice with ethyl acetate. The organic layers were combined, washed with water and brine, dried over sodium sulfate, filtered, concentrated and purified by passing through a 40 gram Biotage silica gel cartridge using 20% EtOAc/hexanes to afford the product as colorless oil. NMR integration indicated >20:1 Z/E selectivity. LRMS calc: 345.2; obs: 346.5 (M+1).

後処理

  1. custombefore quenching with saturated aqueous ammonium chloride solution
  2. extractionThe aqueous layer was extracted twice with ethyl acetate
  3. washwashed with water and brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. custompurified

出典と根拠

ORDレコード
ord-e51224fde6fa4e0d9891097f97451977
出典データセット
uspto-grants-2013_01
特許番号
US08343990B2

反応ノート

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