Semicarbazide → HCID 86599023, compound

Participants

Reaction Steps

To a solution of (207a) (2.39 g, 8.8 mmol), in MeOH (20 ml) was added sodium acetate (0.72 g, 8.8 mmol) and semicarbazide (0.98 g, 8.8 mmol) stirred overnight, concentrated and diluted with CH2Cl2 (100 ml), washed with water, dried and concentrated. Flash chromatography (2% MeOH in CH2Cl2) afforded (208a) (2.10 g, 73%) as an oil: [α]D20 -21 (c 2.55°, CH2Cl2); 1H NMR (CDCl3) δ 9.98 (1H, s), 7.27 (1H, d), 5.8 (1H, m), 5.5 (1H, d), 5.35-5.19 (2H, m), 4.58 (2H, m), 4.14 (1H, m), 2.37 (2H, t), 2.09 (1H, m), 2.0-1.75 (2H, m); Anal. Calcd for C14H24N4O5 : C, 51.21; H, 7.37; N, 17.06. Found: C, 50.2; H, 7.3; N, 16.1

Provenance & Evidence