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Acetic Acid → 3-Methyl-4-(1-pyridin-3-ylmethyl-piperidin-3-ylmethoxy)-benzofuran-2-carboxylic acid ethyl ester

HRID 843170
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HRID 843170 반응식
[CH2:1]([O:3][C:4]([C:6]1[O:7][C:8]2[CH:15]=[CH:14][CH:13]=[C:12]([O:16][CH2:17][CH:18]3[CH2:23][CH2:22][CH2:21][NH:20][CH2:19]3)[C:9]=2[C:10]=1[CH3:11])=[O:5])[CH3:2].[N:24]1[CH:29]=[CH:28][CH:27]=[C:26]([CH:30]=O)[CH:25]=1.C(O)(=O)C.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C1COCC1.C(OCC)(=O)C>[CH2:1]([O:3][C:4]([C:6]1[O:7][C:8]2[CH:15]=[CH:14][CH:13]=[C:12]([O:16][CH2:17][CH:18]3[CH2:23][CH2:22][CH2:21][N:20]([CH2:30][C:26]4[CH:25]=[N:24][CH:29]=[CH:28][CH:27]=4)[CH2:19]3)[C:9]=2[C:10]=1[CH3:11])=[O:5])[CH3:2]
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참가 물질

7

반응물 4

HCID 176Acetic AcidHCID 103713-PyridinecarboxaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 538037073-Methyl-4-(piperidin-3-ylmethoxy)-benzofuran-2-carboxylic acid ethyl ester

생성물 1

HCID 544265053-Methyl-4-(1-pyridin-3-ylmethyl-piperidin-3-ylmethoxy)-benzofuran-2-carboxylic acid ethyl ester

시약·촉매·용매 2

HCID 8028
Tetrahydrofuran
용매
HCID 8857Ethyl Acetate용매

실험 절차

3-Methyl-4-(piperidin-3-ylmethoxy)-benzofuran-2-carboxylic acid ethyl ester (700 mg), pyridine-3-aldehyde (700 μl) and acetic acid (1 ml) were dissolved in THF (20 ml). The solution was stirred at room temperature for four hours. To the solution was added NaB(OAc)3H (1.4 g) and the resulting suspension was stirred overnight at room temperature. The reaction mixture was diluted with ethyl acetate and washed with saturated sodium hydrogencarbonate solution and brine. The organic solvent was dried over anhydrous sodium sulfate and evaporated to dryness. The residue was purified by silica gel column chromatography developed by dichloromethane-methanol to give 3-methyl-4-(1-pyridin-3-ylmethyl-piperidin-3-ylmethoxy)-benzofuran-2-carboxylic acid ethyl ester (777 mg) as a colorless oil. FAB-MS: m/z 409 (MH+); 1H-NMR (CDCl3): δ 1.15-2.30 (7H, m), 1.44 (3H, t, J=7 Hz), 2.58 (3H, s), 2.80 (1H, br d, J=11 Hz), 2.96 (1H, br d, J=8 Hz), 3.48 (1H, d, J=13.5 Hz), 3.57 (1H, d, J=13.5 Hz), 3.89 (1H, dd, J1=9 Hz, J2=8 Hz), 3.96 (1H, dd, J1=9 Hz, J2=5 Hz), 4.43 (2H, q, J=7 Hz), 6.57 (1H, d, J=8 Hz), 7.10 (1H, d, J=8 Hz), 7.21 (1H, dd, J1=8 Hz, J2=5 Hz), 7.28 (1H, t, J=8 Hz), 7.67 (1H, br d, J=8 Hz), 8.49 (1H, dd, J1=5 Hz, J2=1.5 Hz), 8.54 (1H, d, J=1.5 Hz).

후처리

  1. stirringthe resulting suspension was stirred overnight at room temperature
  2. washwashed with saturated sodium hydrogencarbonate solution and brine
  3. dry with materialThe organic solvent was dried over anhydrous sodium sulfate
  4. customevaporated to dryness
  5. customThe residue was purified by silica gel column chromatography

출처 및 근거

ORD 기록
ord-73184b4f2c4c4b628759faf27caf0b8d
출처 데이터셋
uspto-grants-2002_04
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US06376491B1

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