((R)-4-azido-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester → HCID 59152881, compound

Participants

Reaction Steps

A solution of ((R)-4-azido-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester (1.25 g, 5.0 mmol) in ethanol (40 mL) was hydrogenated over 10% palladium on carbon (130 mg) under 30 psi in a 150 mL parr bottle at room temperature for 1 hour. The reaction mixture was filtered through a pad of Celite® (diatomite filter). The filtrate was collected and concentrated in vacuo to afford ((R)-4-amino-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester as an oil (1.10 g, 98%), which was used in the next step without further purification. MS calcd. for C11H17N3O2 223, obsd. (ESI+) [(M+H)+] 224.

Provenance & Evidence