Ethanol → 8-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid

HRID 1526448노트

반응식

HRID 1526448 반응식
C([O:3][C:4](=[O:30])[C:5]([CH3:29])([CH3:28])[CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH:11](C1C=CC=CC=1Cl)[N:12]1[CH2:17][CH2:16][C:15]2[O:18][CH:19]=[CH:20][C:14]=2[CH2:13]1)C.C(O)C.[OH-].[Na+]>O>[O:18]1[C:15]2[CH2:16][CH2:17][N:12]([CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][C:5]([CH3:29])([CH3:28])[C:4]([OH:30])=[O:3])[CH2:13][C:14]=2[CH:20]=[CH:19]1

참가 물질

5

반응물 3

HCID 702EthanolHCID 14798Sodium HydroxideHCID 569716018-(2-chlorophenyl)-8-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid ethyl ester

생성물 1

HCID 1317331748-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid수율 73.5%

시약·촉매·용매 1

HCID 962Water용매2회

실험 절차

8-(2-Chlorophenyl)-8-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid ethyl ester (0.5 g, 1.16 mmol) was added to a mixture of ethanol (20 mL) and sodium hydroxide (0.32 g, 8.0 mmol) in water (6.6 mL). The mixture was heated to reflux for 6.5 hours. Evaporated solvent under reduced pressure and water (20 mL) was added to the residue. The aqueous solution was washed with a mixture of ethyl acetate/heptane 1/10 (10 mL), and the extract was discarded. The aqueous fraction was acidified with concentrated hydrochloric acid to pH=6 and the product was extracted with dichloromethane (3×20 mL). The combined dichloromethane extracts were dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 842-chlorophenyl)-8-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid (0.25 g, 46.9%) as a yellow oil. The material was dissolved in diethyl ether (5 mL) and added to hydrochloric acid solution (2N HCl in diethyl ether, 0.34 mL). Water (12 mL) was added and after mixing the aqueous portion was separated and freeze dried to provide 8-(2-chlorophenyl)-8-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethyloctanoic acid, hydrochloride salt (Compound Io hydrochloride, 0.16 g, light yellow powder, 59.3% yield). 1H NMR (Field: 300 MHz, Solvent: CD3OD/TMS) δ (ppm): 7.77 (br s, 1H), 7.63-7.48 (m, 5H), 6.37 (br s, 1H), 5.05 (m, 1H), 4.18 (m, 1H), 3.62 (m, 1H), 3.02 (m, 2H), 2.36-2.24 (m, 2H), 1.42-1.40 (m, 2H), 1.32 (m, 2H), 1.20-1.18 (m, 4H), 1.11 (s, 6H), 1.08-0.92 (m, 1H). 13C NMR (Field: 75 MHz, Solvent: CD3OD/TMS) δ (ppm): 181.70, 147.11, 144.55, 137.40, 132.15, 131.89, 130.08, 128.21, 129.87, 112.37, 109.71, 66.34, 52.10, 50.05, 43.07, 41.60, 35.10, 31.67, 30.56, 26.64, 25.85, 22.31. HRMS (FIR, DIP-CI): Calculated for C23H30ClNO3 (M+H)+: 404.1987. Found 404.2009. CHN analysis: Calculated; 62.73; C, 7.09; H, 3.18; N, 16.10; Cl. found; 59.13; C, 7.04; H, 3.03; N, 13.58; Cl.

후처리

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 6.5 hours
  3. washThe aqueous solution was washed with a mixture of ethyl acetate/heptane 1/10 (10 mL)
  4. extractionthe product was extracted with dichloromethane (3×20 mL)
  5. dry with materialThe combined dichloromethane extracts were dried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure

출처 및 근거

ORD 기록
ord-b6ffade6512c442cb845f4efb771fdaa
출처 데이터셋
uspto-grants-2015_07
특허 번호
US09085585B2

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