Reaktion #639356

Reaktionsgleichung

H2O

Methanol

NaH

6-chloro-7-fluoro-8-nitro-9H-β-carboline

→

6-chloro-7-methoxy-8-nitro-9H-β-carboline

Ausbeute 97.0%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGto stir at RT
2. 2
   Sonstigea brown solid precipitated out which
3. 3
   Filtrationwas filtered

Vorschrift

Methanol (0.462 ml, 11.4 mmol) was added to a stirring suspension of NaH (684 mg, 17.1 mmol) in DMF (10 ml) under an argon atmosphere. The resulting solution was allowed to stir at RT for 20 min. 6-chloro-7-fluoro-8-nitro-9H-β-carboline (500 mg, 1.9 mmol) was added to the stirring solution and the resulting mixture was allowed to stir at RT. Upon addition of H2O, a brown solid precipitated out which was filtered to give the desired 6-chloro-7-methoxy-8-nitro-9H-β-carboline (510 mg, 97% yield). 1H-NMR (300 MHz, DMSO-d6): δ 4.02 (s, 3H), 8.52 (d, 1H), 8.60 (d, 1H), 9.05 (s, 1H), 9.12 (s, 1H), 12.78 (b, 1H). Retention Time (LC, method: ammonium acetate standard): 2.28 min. MS (M+H+): 278.

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