2-Methoxyethylamine → 6-Bromo-N-(2-methoxyethyl)-3-pyridinemethanamine

To a solution of 6-bromopyridine-3-carbaldehyde (5 g, 26.9 mmol) in DCM (40 mL), was added 2-methoxyethylamine (2.80 mL, 32.3 mmol). After 10 min, sodium triacetoxyborohydride (7.98 g, 37.6 mmol) was added to the mixture and it was stirred at rt for 17 h. DCM (100 mL water (50 mL and NH4Cl (50 mL) were added to the reaction mixture. The organic phase was collected and the aqueous layer was extracted with DCM (3×100 mL). The combined organic solutions were washed with brine and concentrated under reduce pressure. The residue was purified by flash column chromatography, eluent 98/2 to 95/5 DCM/MeOH, to afford title 143 (2.958 g, 45% yield) as a brown oil. 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.31 (dd, J=2.6, 0.6 Hz, 1H), 7.70 (dd, J=8.2, 2.6 Hz, 1H), 7.58 (d, J=8.4 Hz, 1H), 3.69 (s, 2H), 3.37 (t, J=5.8 Hz, 2H), 3.22 (s, 3H), 2.60 (t, J=5.8 Hz, 2H). MS (m/z): 245.1 (M+H).

1. customThe organic phase was collected
2. extractionthe aqueous layer was extracted with DCM (3×100 mL)
3. washThe combined organic solutions were washed with brine
4. concentrationconcentrated
5. customThe residue was purified by flash column chromatography, eluent 98/2 to 95/5 DCM/MeOH

ORD-Eintrag

ord-f4c2c5b120f24be09d9734fcd4533fc2

Quelldatensatz

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08729268B2