1720
A. Khazaei et al.
was added dropwise to the solution with vigorous stirring and stirring
was continued for a few minutes. The reaction mixture was concen-
trated by evaporation of the solvent. The concentrated solution was
chromatographed through a column of silica gel with a 7:1 ratio of
petroleum benezene (40–60) to aceton as eluent. Evaporation of the
solvent gave the pure amide.
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