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

HRID 1015517Notes

Reaction equation

[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([C:10]23[CH2:18][CH:14]4[CH2:15][CH:16]([CH2:17]2)[C:12](C(O)=O)([CH2:13]4)[CH2:11]3)=[CH:6][CH:5]=1)([O-:3])=[O:2].OS(O)(=O)=O.[N-:27]=[N+]=[N-].[Na+]>C(Cl)(Cl)Cl.O>[N+:1]([C:4]1[CH:5]=[CH:6][C:7]([C:10]23[CH2:18][CH:14]4[CH2:15][CH:16]([CH2:17]2)[C:12]([NH2:27])([CH2:13]4)[CH2:11]3)=[CH:8][CH:9]=1)([O-:3])=[O:2]

Participants

Conditions

Temperature: 45 °C

Procedure

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).

Workup

customdid not rise above 40° C
temperaturewas cooled again to ice bath temperature
extractionextracted with EtOAc
extractionextracted with CHCl3
washThe combined organic layer was washed with brine
dry with materialdried over Na2SO4
customthe solvent was removed under reduced pressure

Sources & evidence

ORD record: ord-e4f5912861f542e695a8739a2944371e
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07985759B2

Reaction notes

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