Methyl 2-aminopyridine-4-carboxylate → (2-Aminopyridin-4-yl)methanol

Temperatur

-45 °C

2-Amino-isonicotinic acid methyl ester (6.0 g, 39.4 mmol) was dissolved in 80 mL anhydrous THF in a flame dried round bottom flask under nitrogen gas. The solution was cooled to −45° C. and LAH (39.4 mL, 1M in THF) was added slowly. The reaction was allowed to warm to 0° C. and was quenched by the addition of 15 mL of 1M NaOH (aq). The solution was filtered and the solid was washed with THF. The filtrate was concentrated to afford the pure product. 1H NMR (DMSO-d6) δ 7.79 (d, 1H, J=5.2 Hz), 6.41 (s, 1H), 6.38 (d, 1H, J=5.9 Hz), 5.79 (bs, 2H), 5.19 (t, 2H, J=5.7), 4.35 (d, 2H, J=5.6 Hz).

1. customdried round bottom flask under nitrogen gas
2. additionLAH (39.4 mL, 1M in THF) was added slowly
3. temperatureto warm to 0° C.
4. customwas quenched by the addition of 15 mL of 1M NaOH (aq)
5. filtrationThe solution was filtered
6. washthe solid was washed with THF
7. concentrationThe filtrate was concentrated
8. customto afford the pure product

ORD-Eintrag

ord-7b8b21ff012f4c7daf9cfec6b556f0bb

Quelldatensatz

uspto-grants-2005_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06872724B2