Acetic Acid → HCID 9890404, compound

Participants

Reaction Steps

476 mg of 6-(1-isoquinolyloxy)-4-methoxymethyl-9-tosyl-β-carboline-3-carboxylic acid isopropyl ester is mixed in 10 ml of tetrahydrofuran under argon at -60° C. with 0.79 ml of a 0.9 m solution of phenyllithium in benzene. After 1 hour at -60° C., it is stirred for 16 hours at room temperature. The batch is acidified with glacial acetic acid and concentrated by evaporation. The residue is dispersed in ethyl acetate/water and the organic phase is washed, dried, filtered and concentrated by evaporation in succession with respectively saturated sodium bicarbonate and common salt solution. The residue is chromatographed on silica gel with methylene chloride: ethanol=10:1. The corresponding fractions are combined, concentrated by evaporation and recrystallized. 30 mg of 6-(1-isoquinolyloxy)-4-methoxymethyl-3-benzoyl-β-carboline of melting point 159°-160° C. (ethyl acetate/hexane) is obtained.

Provenance & Evidence