Acetic Acid → 4-Ethoxycarbonyl-4-benzyl-1-nitrosopiperidine

HRID 253065노트

반응식

HRID 253065 반응식
[CH2:1]([O:3][C:4]([C:6]1([CH2:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH2:11][CH2:10][NH:9][CH2:8][CH2:7]1)=[O:5])[CH3:2].[N:19]([O-])=[O:20].[Na+].C(O)(=O)C.C(=O)([O-])O.[Na+]>O>[CH2:1]([O:3][C:4]([C:6]1([CH2:12][C:13]2[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=2)[CH2:7][CH2:8][N:9]([N:19]=[O:20])[CH2:10][CH2:11]1)=[O:5])[CH3:2]

참가 물질

6

반응물 4

HCID 176Acetic AcidHCID 516892Sodium BicarbonateHCID 23668193Sodium NitriteHCID 53297794Ethyl 4-benzylpiperidine-4-carboxylate

생성물 1

HCID 866278474-Ethoxycarbonyl-4-benzyl-1-nitrosopiperidine수율 102.2%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

To a solution of 4-ethoxycarbonyl-4-benzylpiperidine (495 mg) in water (5 mL) was added sodium nitrite (276 mg) and acetic acid (201 μL) and the mixture was stirred at room temperature overnight. To the reaction mixture was added an aqueous saturated sodium hydrogencarbonate solution and the mixture was stirred and extracted with chloroform. The extract was concentrated in vacuo and the resultant crude product was purified by column chromatography on silica gel (solvent: hexane/ethyl acetate=85/15 to 80/20) and dried in vacuo to give 4-ethoxycarbonyl-4-benzyl-1-nitrosopiperidine (565 mg, yield: 100%) as a colorless solid. To a solution of the product (565 mg) in methanol (3 mL) was added zinc powder (654 mg) and then added acetic acid (3 mL) under ice-cooling and the mixture was stirred at room temperature for 3 hours. The reaction mixture was filtered and the filtrate was concentrated in vacuo. To the residue was added an aqueous saturated sodium hydrogencarbonate solution and chloroform and the mixture was stirred and extracted with chloroform. The extract was dried over magnesium sulfate and filtered. The filtrate was concentrated in vacuo to give 1-amino-4-benzyl-4-ethoxycarbonylpiperidine (508 mg, yield: 97%) as a colorless viscidity.

후처리

  1. stirringthe mixture was stirred
  2. extractionextracted with chloroform
  3. concentrationThe extract was concentrated in vacuo
  4. customthe resultant crude product was purified by column chromatography on silica gel (solvent: hexane/ethyl acetate=85/15 to 80/20)
  5. customdried in vacuo

출처 및 근거

ORD 기록
ord-2682456ba2764323bc5a5368508f8a27
출처 데이터셋
uspto-grants-2011_01
특허 번호
US07872006B2

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