Reacción #502126

Ecuación de reacción

N-hydroxyphthalimide

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

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

→

title compound

Rendimiento 47.0%

1,3-Dioxobenzo(c)azolidin-2-yl(2S)-2-(6-methoxy(2-naphthyl))propanoate

Rendimiento 47.0%

Disolventes

CH2Cl2

DMF

CH2Cl2

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe solvent was evaporated under vacuum
2. 2
   workup.DISSOLUTIONThe residue was then dissolved in EtOAc
3. 3
   Lavadowashed with brine
4. 4
   Secadodried over Na2SO4
5. 5
   Filtraciónfiltered
6. 6
   OtroThe residue after evaporation of the solvent
7. 7
   Otrowas chromatographed on silica gel eluting with EtOAc:hexane (1:1)

Procedimiento

A mixture of N-hydroxyphthalimide (7.1 g, 43.4 mmol), (2S)-2-(6-methoxy(2-naphthyl))propanoic acid (naproxen, 10 g, 43.4 mmol) and N,N-dimethylaminopyridine (DMAP, 5.3 g, 43.4 mmol) in CH2Cl2 (70 mL) and DMF (30 mL) at 0° C. was treated with 1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide hydrochloride (8.3 g, 43.4 mmol) in CH2Cl2 (50 mL). The reaction mixture was stirred at room temperature for 16 hours and the solvent was evaporated under vacuum. The residue was then dissolved in EtOAc, washed with brine, dried over Na2SO4 and filtered. The residue after evaporation of the solvent was chromatographed on silica gel eluting with EtOAc:hexane (1:1) to give the title compound (7.6 g, 47% yield) as a white solid. Mp 110-112° C. 1H NMR (300 MHz, d6-DMSO) δ 7.80-8.06 (m, 7H), 7.50 (dd, J=1.7 and 8.5 Hz, 1H), 7.32-7.37 (m, 1H), 7.20 (dd, J=2.5 and 9.0 Hz, 1H), 4.50 (q, j=7.1 Hz, 1H), 3.89 (s, 3H), 1.64 (d, J=7.1 Hz, 3H). 13C NMR (75 MHz, d6-DMSO) δ 171.2, 161.8, 157.5, 153.0, 135.5, 133.6, 133.5, 129.3, 128.4, 128.2, 127.3, 126.1, 126.0, 124.0, 119.0, 105.8, 55.2, 41.8, 18.6. Mass spectrum (API-TIS) m/z 376 (MH+), 393 (MNH4+).

Fuente