3-Pyridineacetic acid → HCID 67915794, compound

Participants

Reaction Steps

N,N'-Carbonyldiimidazole (0.81 g) is added to a solution of 2-(3-pyridyl)acetic acid (0.685 g) in dry dichloromethane (15 cc), cooled to +5° C. The mixture is stirred for 30 minutes at +5° C. and a solution of (3aRS,7aRS)-7,7-diphenyl-4-perhydroisoindolone hydrochloride (1.6 g) and triethylamine (0.7 cc) in dichloromethane (10 cc) is then added. The reaction mixture is stirred at 20° C. for 16 hours and then concentrated to dryness under reduced pressure (2.7 kPa). The residue is taken up in a mixture of ethyl acetate (100 cc) and water (75 cc). The organic phase is washed with saturated sodium chloride solution (50 cc), dried over magnesium sulphate and filtered and the filtrate is concentrated to dryness under reduced pressure (2.7 kPa). The residue is chromatographed on a basic alumina column (diameter 2 cm, height 15 cm), eluting with ethyl acetate and collecting 50 cc fractions. Fractions 4 to 24 are concentrated to dryness under reduced pressure (2.7 kPa). The crystals obtained are recrystallized from acetonitrile (cc) to give (3aRS,7aRS)-7,7-diphenyl-2-[2-(3-pyridyl)acetyl]-4-perhydroisoindolone (0.9 g) in the form of white crystals melting at 208° C.

Provenance & Evidence