Reaktion #1951036

Reaktionsgleichung

2,5,6-Trichloro-3-acetyl-1-[3,5-di-O-(p-toluoyl)-2-deoxy-β-D-ribofuranosyl]indole

sodium methoxide

→

4.117

Ausbeute 74.0%

2,5,6-Trichloro-3-acetyl-1-(2-deoxy-β-D-ribofuranosyl)indole

Ausbeute 74.0%

Lösungsmittel

MeOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigea precipitate then formed
2. 2
   workup.WAITto stand at 4° C. for 4 h
3. 3
   Filtrationwas then filtered
4. 4
   Waschenthe solids rinsed with cold MeOH (10 mL)
5. 5
   SonstigeThe solid was recrystallized
6. 6
   Temperaturfrom warm MeOH

Vorschrift

2,5,6-Trichloro-3-acetyl-1-[3,5-di-O-(p-toluoyl)-2-deoxy-β-D-ribofuranosyl]indole (4.116, 0.62 g, 1.0 mmol) was suspended in dry MeOH (50 mL) to which was added sodium methoxide (220 mg, 4.1 mmol). The suspension was stirred at room temperature for 16 h, after which time the solution first clarified and a precipitate then formed. The suspension was allowed to stand at 4° C. for 4 h, and was then filtered, and the solids rinsed with cold MeOH (10 mL). The solid was recrystallized from warm MeOH to yield 0.28 g (74%) of 4.117 as a white crystalline solid: mp dec. >200 C; Rf0.4 (10% MeOH/CHCl3); 1H-NMR (500 MHz, DMSO-d6): δ 8.52 (s, 1H), 8.37 (s, 1H), 6.49 (dd, 1H), 5.43 (s, 1H, D2O exch.), 5.26 (s, 1H, D2O exch.), 4.45 (m, 1H), 3.89 (d, 1H), 3.72 (m, 2H), 2.60 (s, 3H), 2.49 (m, 1H), 2.13 (m, 1H). 13C-NMR (125 MHz, DMSO-d6): δ 192.13, 132.15, 131.99, 126.12, 125.50, 125.65, 121.96, 115.25, 112.85, 87.55, 85.43, 69.81, 60.67, 47.10, 30.68. HRMS (EI) m/z calcd. for C15H14Cl3NO4 376.9988, found 376.9982. Anal calcd for C15H14Cl3NO4: C, 47.58; H, 3.73; N, 3.70. Found: C, 47.52; H, 3.95; N, 3.59.

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