Cyanogen Bromide → HCID 59710157, compound

Participants

Reaction Steps

4.00 g of cis-3,5-dimethylpiperazine-1-carboxylic acid tert-butyl ester (prepared according to the method E. Jon Jacobson et. al. J. Med. Chemistry. 1999, Vol. 42, 1123-144) in 91 mL of dichloromethane was treated with sodium bicarbonate (4.7 g) followed by addition of cyanogen bromide (7.5 mL). The reaction mixture was heated at reflux overnight, was filtered, and was purified by column chromatography (0 to 50% ethyl acetate/hexanes) to afford 3.9 g of the title compound as a white solid. 1H NMR (CDCl3, 300 MHz) δ ppm 1.33 (d, 6H, J=6.5 Hz), 1.44 (s, 9H), 2.54 (m, 2H), 3.09 (m, 2H), 4.09 (m, 2H); 13C NMR (CDCl3, 75 MHz) 16.70 (2C), 28.54 (3C), 53.86 (4C), 80.86, 114.10, 154.22.

Provenance & Evidence