1,1'-Carbonyldiimidazole → 5-Chloro-3-(4-(2-methyl-4-thiazolyl)-2-thenoyl)-2-oxindole-1-carboxamide

Beteiligte Stoffe

Reaktionsschritte

The title compound was prepared according to the procedure of Example 55. A 1.25 g (5.55 mmoles) sample of 4-(2-methyl-4-thiazolyl)-2-thiophenecarboxylic acid (prepared as described in Example 18) was converted to the acyl imidazole by reaction with 0.98 g (6.05 mmoles) of 1,1′-carbonyldiimidazole in 15 ml of N,N-dimethylformamide. After complete reaction this solution was transferred to an addition funnel and slowly added 1.06 g (5.04 mmoles) of 5-chloro-2-oxindole-1-carboxamide and 1.66 g (13.59 mmoles) of 4-(N,N-dimethylamino)pyridine in 50 ml of N,N-dimethylformamide. Acidic workup followed by filtration and trituration with 2-butanone gave 0.50 g (1.20 mmoles) of title compound as a yellow solid, m.p. 238-241° C.

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