Cyclohexanecarboxylic acid → 2-(7-Chloro-1,8-naphthyridin-2-yl)-3-(4-cyclohexylcarbonylpiperazin-1-yl)carbonyloxy-isoindolin-1-one

関与物質

反応手順

The procedure of Example 14 is followed but starting with 2-(7-chloro-1,8-naphthyridin-2-yl)-3-(piperazin-1-yl)carbonyloxy-isoindolin-1-one (4.23 g.), N,N'-dicyclohexylcarbodiimide (3.1 g.) in anhydrous methylene chloride (100 cc.) and cyclohexylcarboxylic acid (1.92 g.). After having filtered off the precipitate, the organic solution is washed with an 8% aqueous solution of sodium bicarbonate (20 cc.) and then dried over anhydrous potassium carbonate (10 g.). After the solution has been filtered and the filtrate concentrated to dryness, the residue is recrystallised from ethanol (300 cc.). 2-(7-Chloro-1,8-naphthyridin-2-yl)-3-(4-cyclohexylcarbonylpiperazin-1-yl)carbonyloxy-isoindolin-1-one (3.7 g.), which melts at 240° C., is thus obtained.

情報源と証拠