Hydrochloric Acid → 4-(2-Chlorophenoxy)piperidine hydrochloride

HRID 1093554ノート

反応式

HRID 1093554 の反応式
C(OC([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[Cl:21])[CH2:10][CH2:9]1)=O)(C)(C)C.Cl>O1CCOCC1>[ClH:21].[Cl:21][C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][C:15]=1[O:14][CH:11]1[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]1

参加物

4

反応物 2

HCID 313Hydrochloric AcidHCID 16732586Tert-butyl 4-(2-chlorophenoxy)piperidine-1-carboxylate

生成物 1

HCID 167325894-(2-Chlorophenoxy)piperidine hydrochloride収率 198.7%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

実験手順

To a stirred solution of 2-chlorophenol (20 g, 0.155 mole) in DMF (200 mL), was added cesium carbonate (101 g, 0.311 mole), followed by 4-methanesulfonyloxy-piperidine-1-carboxylic acid tert-butyl ester (43.45 g, 0.155 mole). The reaction mixture was heated at 65° C. for 7 hours. The mixture was then filtered and concentrated under reduced. The resulting residue was diluted with ice cold water and the solid obtained was filtered and washed with water. The solid was dissolved in ether, washed with 2.5N aqueous NaOH solution, dried over sodium sulfate and concentrated under reduced pressure to afford 24.24 g (50%) of 4-(2-chloro-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester. LCMS: 312.13 (M+1)+, 98.35%. A solution of 4-(2-chloro-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester (24.2 g, 0.0776 mole) in dioxane.HCl (30 mL), was stirred at ambient temperature for 2 hours. The reaction mixture was then concentrated under reduced pressure and the resulting residue was washed with hexane twice to afford 19.13 g (99.6%) of 4-(2-chloro-phenoxy)-piperidine hydrochloride. LCMS: 248.05 (M+1)+, 92.79%. 1H NMR (DMSO-d6): δ 9.3-8.9 (bs, 2H), 7.5-7.42 (d, 1H), 7.38-7.24 (m, 2H), 7.04-6.94 (t, 2H), 4.8-4.7 (m, 1H), 3.3-3.0 (bd, 4H), 2.2-2.05 (bs, 2H), 2.0-1.8 (bs, 2H).

後処理

  1. concentrationThe reaction mixture was then concentrated under reduced pressure
  2. washthe resulting residue was washed with hexane twice

出典と根拠

ORDレコード
ord-0ce1795ba6b148cd8d19687f5d49ab94
出典データセット
uspto-grants-2012_03
特許番号
US08129376B2

反応ノート

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