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Triphenylphosphine → Tert-butyl 4-(5-chloro-3-(methoxycarbonyl)-2-methylphenoxy)piperidine-1-carboxylate

HRID 1050463
ノート
印刷プレビュー

反応式

HRID 1050463 の反応式
[Cl:1][C:2]1[CH:3]=[C:4]([OH:13])[C:5]([CH3:12])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].O[CH:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[Cl:1][C:2]1[CH:11]=[C:6]([C:7]([O:9][CH3:10])=[O:8])[C:5]([CH3:12])=[C:4]([CH:3]=1)[O:13][CH:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 11776TriphenylphosphineHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylateHCID 5363146Diisopropyl azodicarboxylateHCID 70904667Methyl 5-chloro-3-hydroxy-2-methylbenzoate

生成物 1

HCID 90273066Tert-butyl 4-(5-chloro-3-(methoxycarbonyl)-2-methylphenoxy)piperidine-1-carboxylate収率 80%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
55 °C

実験手順

A mixture of methyl 5-chloro-3-hydroxy-2-methylbenzoate (500 mg, 2.492 mmol), tert-butyl 4-hydroxypiperidine-1-carboxylate (752 mg, 3.74 mmol) and triphenylphosphine (1307 mg, 4.98 mmol), stirred in THF (10 mL) until completely dissolved, then DIAD (1.530 mL, 7.48 mmol) was slowly added dropwise via syringe over 5 minutes. The reaction heated at 55° C. for 4 h under nitrogen. The reaction was cooled to room temperature and concentrated in vacuo. The orange oil residue was purified by flash column chromatography (30% EtOAc/hexanes). The desired fractions were combined, concentrated, then triturated with EtOAc to give tert-butyl 4-(5-chloro-3-(methoxycarbonyl)-2-methylphenoxy)piperidine-1-carboxylate (0.765 g, 1.99 mmol, 80% yield. 1H NMR (400 MHz, DMSO-d6) δ 1.10-1.26 (m, 1 H) 1.41 (s, 9 H) 1.49-1.63 (m, 2 H) 1.79-1.92 (m, 2 H) 2.28 (s, 3 H) 3.15-3.30 (m, 2 H) 3.51-3.66 (m, 2 H) 3.83 (s, 3 H) 4.63-4.81 (m, 1 H) 7.31 (d, J=2.02 Hz, 1 H) 7.37 (d, J=2.02 Hz, 1 H) MS (ES) [M+H]+ 384.1.

後処理

  1. dissolutionuntil completely dissolved
  2. temperatureThe reaction was cooled to room temperature
  3. concentrationconcentrated in vacuo
  4. customThe orange oil residue was purified by flash column chromatography (30% EtOAc/hexanes)
  5. concentrationconcentrated
  6. customtriturated with EtOAc

出典と根拠

ORDレコード
ord-f3161348f9b944cab1740fd8f13a6c63
出典データセット
uspto-grants-2016_07
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09382234B2

反応ノート

読み込み中…

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