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0 °C

To a solution of methyl thieno[3,2-b]pyridine-2-carboxylate (C-3) (600 mg, 3.1 mmol) in 30 mL of anhydrous THF at 0° C. was added LiAlH4 (472 mg, 12.4 mmol) in anhydrous THF (25 mL) dropwise over 20 mins. The reaction mixture was stirred at 0° C. for 30 mins. MeOH was added and the resulting mixture was purified by chromatography to afford the title compound. MS (m/z): 166 (M+1)+.

1. customthe resulting mixture was purified by chromatography