Реакция #1951030

Уравнение реакции

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

hydrazine hydrate

→

4.37

Выход 90.0%

5,6-Dichloro-3-amino-8-(β-D-ribofuranosyl)pyrazolo[3,4-b]indole

Выход 90.0%

Растворители

water

Условия реакции

Обработка

1. 1
   ДругоеThe suspension thus obtained
2. 2
   Температураcooled to 0° C.
3. 3
   Фильтрацияthe suspension filtered
4. 4
   Промывкаthe solids rinsed with water
5. 5
   ДругоеThe solids were recrystallized from MeOH/H2O

Методика

2,5,6-Trichloro-3-cyano-1-(β-D-ribofuranosyl)indole (4.4, 102 mg, 0.27 mmol) was dissolved in hydrazine hydrate (2 mL), and the resulting solution was stirred at room temperature for 30 min. The suspension thus obtained was diluted with water (8 mL), cooled to 0° C., and the suspension filtered and the solids rinsed with water. The solids were recrystallized from MeOH/H2O to yield 91 mg (90%) of 4.37 as a white crystalline solid: mp 198-201° C.; Rf0.3 (20% MeOH/CHCl3); 1H-NMR (500 MHz, DMSO-d6): δ 8.68 (s, 1H, D2O exch.), 7.76 (s, 1H), 7.27 (s, 1H), 5.81 (d, 1H), 5.78 (b, 1H, D2O exch.), 5.31-5.28 (m, 2H, D2O exch.), 4.84 (s, 2H, D2O exch.), 4.27 (q, 1H), 4.07 (s, 1H), 4.00 (s, 1H), 3.68 (q, 2H). 13C-NMR (125 MHz, DMSO-d6): δ 155.50, 131.99, 129.00, 123.60, 121.60, 116.91, 115.45, 111.96, 88.32, 85.95, 71.06, 69.95, 63.28, 60.78. HRMS (EI) m/z calcd. for C14H14Cl2N4O4 372.0392, found 372.0397. Anal calcd for C14H14Cl2N4O4.¼H2O: C, 44.52; H, 3.87; N, 14.83. Found: C, 44.63; H, 4.10; N, 14.72.

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