Sodium Dithionite → HCID 11609721, compound

Participants

Reaction Steps

To a solution of sodium hydrosulfite (936 mg, 5.30 mmol) in 8 mL of water was added 1-(5-azido-2-nitro-phenyl)-piperidine (133 mg, 0.530 mmol, as prepared in the previous step) in 4 mL of THF dropwise. After 25 min the reaction was poured into 50 mL of brine, extracted with EtOAc (3×30 mL), dried (Na2SO4), and concentrated in vacuo. The crude product was then allowed to react in a manner similar to Example 4, step (c), with 5-cyano-furan-2-carbonyl chloride (31 mg, 0.20 mmol) in the presence of DIEA (203 μL, 1.16 mmol) to afford 8 mg (12%) of the title compound as an amber solid. 1H-NMR (CDCl3; 400 MHz): δ 9.58 (s, 1H), 8.44 (d, 1H, J=7.8 Hz), 7.22-7.30 (m, 2H), 6.81-6.89 (m, 2H), 2.81-2.86 (m, 4H), 1.79-1.82 (m, 4H), 1.62-1.65 (m, 2H); Mass spectrum (ESI, m/z): Calcd. for C17H16N6O2, 337.1 (M+H), found 337.0.

Provenance & Evidence