4-Fluorobenzaldehyde → rac-Methyl (1R,2R,4S,5S,65,7R)-7-{[(4-fluorophenyl)methyl]amino}tricyclo[3.2.2.02,4]nonane-6-carboxylate

Temperature

25 °C

rac-Methyl (1R,2R,4S,5S,6S,7R)-7-aminotricyclo[3.2.2.02,4]nonane-6-carboxylate hydrochloride (0.43 g, 1.85 mmol) was dissolved in methanol (10 mL). Sodium acetate (0.30 g, 3.70 mmol) was added followed by 4 Å powdered molecular sieves (0.40 g) and 4-fluoro-benzaldehyde (0.20 mL, 1.85 mmol). Sodium cyanoborohydride (0.23 g, 3.70 mmol) was added and the mixture was stirred at 25° C. for 16 h. The mixture was 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,65,7R)-7-{[(4-fluorophenyl)methyl]amino}tricyclo[3.2.2.02,4]nonane-6-carboxylate as a clear oil. LC-MS (ESI) calcd for C17H22FNO2 291.36, found 292.2 [M+H+].

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

ORD record

ord-970fbb0f68664d65993d883bc3c52de3

Source dataset

uspto-grants-2012_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08236948B2