반응 #502130

반응 방정식

(2S)-2-(6-methoxy(2-naphthyl))propanoic acid

N,N-bis(2-hydroxyethyl)-p-toluenesulfonamide

1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide hydrochloride

→

title compound

수율 70.0%

2-((2-Hydroxyethyl)((4-methylphenyl)sulfonyl)amino)ethyl(2S)-2-(6-methoxy(2-naphthyl))propanoate

수율 70.0%

용매

CH2Cl2

DMF

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후처리

1. 1
   기타partitioned between CH2Cl2 and HCl (1N)
2. 2
   세척The aqueous layer was washed with CH2Cl2
3. 3
   세척the combined organic extracts were washed with water, brine
4. 4
   건조dried over magnesium sulfate
5. 5
   농축concentrated in vacuo
6. 6
   기타The residue was purified by column chromatography on silica gel eluting with EtOAC/hexane (1:1)

실험 절차

To a solution of (2S)-2-(6-methoxy(2-naphthyl))propanoic acid(naproxen, 5.0 g, 21.7 mmol), N,N-bis(2-hydroxyethyl)-p-toluenesulfonamide (16.89 g, 65.1 mmol) and N,N-dimethylaminopyridine (DMAP, 0.530 g, 4.34 mmol) in CH2Cl2 (250 mL) and DMF (3 mL) at room temperature was added 1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide hydrochloride (EDAC, 4.99 g, 26.05 mmol). The reaction mixture was stirred overnight at room temperature, and then partitioned between CH2Cl2 and HCl (1N). The aqueous layer was washed with CH2Cl2 and the combined organic extracts were washed with water, brine, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by column chromatography on silica gel eluting with EtOAC/hexane (1:1) to give the title compound as a thick oil (7.15 g, 15.16 mmol, 70% yield): 1H NMR (300 MHz, CDCl3) δ 7.73 (d, J=8.6 Hz, 2H), 7.66 (m, 1H), 7.67 (d, J=8.6 Hz, 2H), 7.40 (dd, J=1.7, 8.5 Hz, 1H), 7.29 (d, J=8.1 Hz, 2H), 7.18 (dd, J=2.5, 8.8 Hz, 1H), 7.14 (d, J=2.4 Hz, 1H), 4.28 (m, 2H), 3.95 (s, 3H), 3.88 (q, J=7.2 Hz, 1H), 3.38 (m, 2H), 3.09 (t, J=5.1 Hz, 2H), 2.44 (s, 3H), 2.18 (t, J=6.0 Hz, 1H), 1.61 (d, J=7.2 Hz, 3H). Mass spectrum (API-TIS) m/z 472 (MH+), 489 (M+18+).

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