Nitronium tetrafluoroborate → 2-(Methylsulfonyl)-4-(3-nitrobenzo[b]thiophen-2-yl)pyrimidine

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Reaction Steps

Nitronium tetrafluoroborate (3.4 mL, 0.5 M in sulfolane, 1.72 mmol) was slowly added at 0° C. to a suspension of 4-(benzo[b]thiophen-2-yl)-2-(methylsulfonyl)pyrimidine (0.50 g, 1.72 mmol) in acetonitrile (10 mL). The resulting mixture was stirred at rt for 14 h and concentrated in vacuo. The product was purified by flash chromatography eluting with ethyl acetate/hexane (1:3) to afford the title compound (0.35 g, 57%). MS (M+H)+ 336.

Provenance & Evidence