Sulfuric Acid → 1-(4-Nitrophenyl)tricyclo[3.3.1.03,7]nonan-3-amine

Participants

Reaction Conditions

Reaction Steps

To the stirred solution of 1-(4-nitrophenyl)tricyclo[3.3.1.03,7]nonane-3-carboxylic acid (3.0 g, 10.45 mmol) obtained in step II, in CHCl3 (21 mL) was added conc. H2SO4 (4.2 mL, 78.9 mmol) then solid NaN3 was added in portions, so that the temperature of the reaction did not rise above 40° C. The reaction mixture was warmed to 45° C. and after stirring for 2 h it was cooled again to ice bath temperature, diluted with water and extracted with EtOAc. The aqueous layer was basified with 50% NaOH solution and extracted with CHCl3. The combined organic layer was washed with brine, dried over Na2SO4, and the solvent was removed under reduced pressure to obtain 1-(4-nitrophenyl)tricyclo[3.3.1.03,7]nonan-3-amine as an off-white solid (2.0 g) in 74% yield. M.R: 201.0-205.9° C. m/z (M+1) 259; IR cm−1 3435, 2941, 1643, 1596, 1518, 1400, 1349, 1013, 750. 1H NMR (CDCl3) 300 MHz δ 8.14 (d, J=8.8 Hz, 2H), 7.39 (d, J=8.8 Hz, 2H), 3.70-3.60 (d (br), 2H), 2.62-2.50 (m, 2H), 2.38-2.23 (m, 3H), 2.15-2.0 (m, 3H), 1.95-1.60 (m, 4H).

Provenance & Evidence