Propionic Acid → HCID 14576241, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 6-[4,5,6,7-tetrahydro-1-(4-nitrophenyl)-1H-inda-zol-3-yl]hexanoic acid (1.11 g, 3 mmol) in THF (10 ml) was treated with sodium borohydride (0.175 g) and boron trifluoride etherate (4.7 mmol) in THF (11 ml) during 0.5 hour. The solution was reacted for 18 hours at ambient temperature, treated with propionic acid (2 ml), and heated at 70° C. for 2 hours. The solution was cooled, dilution with water and the precipitate was extracted into ethyl acetate. Drying and evaporation of solvent gave crude title compound (1.69 g) as a viscous residue. Polar impurities were removed by filtration through silica gel (100 g) to yield pure title compound (0.45 g), m.p. 60°-61° C., after methanol crystallization.

Provenance & Evidence