Reaktion #675982

Reaktionsgleichung

2-(4,5-dichloro-2-hydroxyphenylamino)acetic acid

1-(2,6-diazaspiro[3.4]octan-6-yl)prop-2-en-1-one

EDCI.HCl

HOBt

Et3N

→

desired product

Ausbeute 17.0%

1-(2-((4,5-Dichloro-2-hydroxyphenyl)glycyl)-2,6-diazaspiro[3.4]octan-6-yl)prop-2-en-1-one

Ausbeute 17.0%

Lösungsmittel

water

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with ethyl acetate
2. 2
   WaschenThe organic layer was washed withed saturated NaHCO3 solution and brine
3. 3
   Trocknendried over Na2SO4
4. 4
   Einengenconcentrated in vacuo
5. 5
   SonstigeThe residue was purified by flash column chromatography on silica gel (DCM/MeOH=30:1)

Vorschrift

The mixture of 2-(4,5-dichloro-2-hydroxyphenylamino)acetic acid (47 mg, 0.2 mmol), 1-(2,6-diazaspiro[3.4]octan-6-yl)prop-2-en-1-one (40 mg, 0.2 mmol), EDCI.HCl (46 mg, 0.24 mmol), HOBt (32 mg, 0.24 mmol) and Et3N (0.61 mg, 0.6 mmol) in DMF (10 mL) was stirred at room temperature for 2 h. The mixture was poured into water and extracted with ethyl acetate. The organic layer was washed withed saturated NaHCO3 solution and brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel (DCM/MeOH=30:1) to afford the desired product (13 mg, 17% yield). 1H NMR (400 MHz, DMSO-d6) δ: 10.17 (s, 1H), 6.78 (s, 1H), 6.60-6.50 (m, 2H), 6.13 (dt, J=2.4, 16.4 Hz, 1H), 5.67 (dd, J=2.4, 10.4 Hz, 1H), 5.19 (dd, J=5.2, 10.0 Hz, 1H), 4.16-4.07 (m, 2H), 3.90-3.83 (m, 2H), 3.75-3.72 (m, 3H), 3.61-3.52 (m, 2H), 3.42-3.39 (m, 1H), 2.16-2.13 (m, 1H), 2.06-2.03 (m, 1H). ESI-MS m/z: 382.3 [M−H]−.

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