Sodium Thiosulfate → 7-[(1S)-2-{[tert-Butyl(dimethyl)silyl]oxy}-1-methylethyl]-5-iodo-7H-pyrrolo[2,3-d]pyrimidine

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Reaction Steps

N-Iodosuccinimide (124 g, 553 mmol) was added to 7-[(1S)-2-{[tert-butyl(dimethyl)silyl]oxy}-1-methylethyl]-7H-pyrrolo[2,3-d]pyrimidine (153.4 g, 526 mmol) (see Preparation 8) in acetonitrile (700 mL). The mixture was stirred at room temperature for 16 hours then saturated aqueous sodium thiosulfate (700 mL) was added. The mixture was extracted with EtOAc (800 mL) then the organic extract was dried over magnesium sulfate and evaporated in vacuo. The crude material was purified by column chromatography on silica gel (gradient of pentane:EtOAc 90:10 to 80:20) to afford the title compound as a yellow solid in 66% yield, 145 g. 1H NMR (400 MHz, CDCl3) δ: −0.90 (d, 6H) 0.80 (s, 9H) 1.58 (d, 3H) 3.84 (m, 2H) 5.07 (m, 1H) 7.48 (s, 1H) 8.73 (s, 1H) 8.86 (s, 1H).

Provenance & Evidence