HCID 69624759, compound → HCID 69624726, compound

Participants

Reaction Steps

To a solution of (2R*)-2-[N-(carbobenzyloxy)amino]-3-[2-(2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl)indole-3-yl]propionic acid [compound (XII-1) wherein R1 to R4 are benzyl and Ar is phenyl](181 mg (0.210 mmol)) in ethanol (45 ml) was added 20% palladium hydroxide-carbon catalyst (150 mg) and the mixture was stirred at about 60° C. for about 11 hours under atmospheric pressure in the presence of hydrogen. The reacted solution was filtrated on Celite and the filtrate was concentrated. The residue was fractionated by high performance liquid chromatography [column: YMC-Pack ODS-AM SH-365-10AM, 500×30 mm, S-10, 120 Å; temperature: room temperature; migrating layer: 5% acetonitrile-water; flow rate: 40 ml/min.; detection: 278 nm (UV)] and then freeze-dried to give 48 mg (yield 62%) of (2R*)-2-amino-3-[2-(α-mannopyranosyl)indole-3-yl]propionic acid [compound (XIII-1)].

Provenance & Evidence