Nitrogen → 1-[6-(2-Methyl-[1,3]dioxolan-2-yl)-pyridin-2-ylmethyl]-1H-pyrazol-3-ylamine

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Reaction Conditions

Reaction Steps

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a 0.1M solution of 2-(2-methyl-[1,3]dioxolan-2-yl)-6-(3-nitro-pyrazol-1-ylmethyl)-pyridine (270 mg, 0.93 mmol), iron powder (157 mg, 2.79 mmol) and NH4Cl (251 mg, 2.79 mmol) in a mixture of EtOH (2.0 mL) and water (1.0 mL) was stirred at 75° C. for 90 min. The reaction mixture was filtered while hot and concentrated under reduced pressure. CH2Cl2 (20 mL) was added followed by 1N NaOH (20 mL). The aq. layer was extracted with CH2Cl2 (2×20 mL) and the combined org. extracts were dried over MgSO4, filtered, and the solvents were removed under reduced pressure to give the title compound as a pale yellow oil. TLC: rf (EA)=0.20. LC-MS-conditions 02: tR=0.59 min; [M+H]+=261.40.

Provenance & Evidence