Reaktion #79699

Reaktionsgleichung

{9-[(2,3-difluorophenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester

NaOH

→

{9-[(2,3-difluorophenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid

Ausbeute 93.7%

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled in the refrigerator
2. 2
   FiltrationThe resultant white precipitate was collected by filtration
3. 3
   Waschenwashed with a small amount of EtOH/diethyl ether/hexanes
4. 4
   Sonstigedried in vacuo

Vorschrift

A suspension of the {9-[(2,3-difluorophenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester (85 mg, 0.2 mM) and 0.22 mL (0.22 mM) of 1 N NaOH in 5 mL of ethanol was stirred for 18 hours at 25° C. A small volume of diethyl ether/hexanes was added, then cooled in the refrigerator. The resultant white precipitate was collected by filtration, washed with a small amount of EtOH/diethyl ether/hexanes, then dried in vacuo to afford 77 mg (89%) of the {9-[(2,3-difluorophenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, sodium salt as a white powder. 1H NMR (DMSO-d6) δ7.7-7.2 (m, 6H), 7.2-7.0 (m, 3H), 6.6 (d, 1H, J=8 Hz), 6.45 (t, 1H, J=8 Hz), 5.7 (s, 2H), and 4.35 (s, 2H). IR (KBr, cm−1) 3467, 3390, 1662, and 1616. MS (ES) m/e 409, 411, 433.

Quelle