Tetrahydrofuran → HCID 15980985, compound

2-Methoxy-3-(4-nitrophenyl)acrylic acid (6.7 g, 30 mmol) was taken up in methanol (700 ml) and THF (300 ml) and 10% Pd on C (wet basis) (0.67 g) was added. The mixture was hydrogenated at 45 psi for 43 mins, followed by repeated refills to 45-48 psi every hour for 3 hr and finally 48 psi for 18 hr. The resulting suspension was filtered through GF/F filter paper and the filter residue washed with MeOH (200 ml). The filtrates were concentrated to an off-white solid. The solid was slurried in IMS (75 ml) at 20° C. for 1.5 hr, filtered, and washed with IMS/heptane (1:2) (20 ml) and dried on the filter for 1 hr to afford (±)-2-methoxy-3-(4′-aminophenyl)-propionic acid as an off-white solid (5.1 g, 88% yield)

1. customfor 3 hr
2. waitfinally 48 psi for 18 hr
3. filtrationThe resulting suspension was filtered through GF/F
4. filtrationfilter paper
5. washthe filter residue washed with MeOH (200 ml)
6. concentrationThe filtrates were concentrated to an off-white solid
7. waitThe solid was slurried in IMS (75 ml) at 20° C. for 1.5 hr
8. filtrationfiltered
9. washwashed with IMS/heptane (1:2) (20 ml)
10. customdried on the
11. filtrationfilter for 1 hr

ORD record

ord-63785b88989f470a8925b464d952e4cc

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09345680B2