Acetic Acid → rac-Methyl (1R,2R,4S,5S,6R,7S)-7-{[(4-fluorophenyl)methyl]amino}tricyclo[3.2.2.02,4]nonane-6-carboxylate

Temperature

60 °C

The crude rac-Methyl (1R,2R,4S,5S,6R,7S)-7-aminotricyclo[3.2.2.02,4]nonane-6-carboxylate was dissolved in methanol (10 mL). Acetic acid (0.12 mL, 2.14 mmol) was added followed by 4-fluoro-benzaldehyde (0.12 mL, 1.07 mmol). Sodium cyanoborohydride (0.14 g, 2.14 mmol) was added and the mixture was stirred at 60° C. for 16 h. The mixture was cooled to 25° C. and poured into a mixture of saturated aqueous sodium bicarbonate solution (20 mL) and ethyl acetate (30 mL). After shaking, both layers were passed through a plug of Celite. The organic layer was further washed with saturated aqueous sodium bicarbonate solution (10 mL), saturated aqueous brine solution (10 mL), dried over magnesium sulfate, filtered, and concentrated in vacuo to afford the crude product, rac-Methyl (1R,2R,4S,5S,6R,7S)-7-{[(4-fluorophenyl)methyl]amino}tricyclo[3.2.2.02,4]nonane-6-carboxylate, as a clear oil, which was used in the next step without further purification. LC-MS (ESI) calcd for C17H22FNO2 291.36, found 292.0 [M+H+].

1. temperatureThe mixture was cooled to 25° C.
2. stirringAfter shaking
3. washThe organic layer was further washed with saturated aqueous sodium bicarbonate solution (10 mL), saturated aqueous brine solution (10 mL)
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo

ORD record

ord-99f5e947ea104003a69887c196d6d04e

Source dataset

uspto-grants-2011_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07939524B2