Chloride → 1-(2,4 Hexadienoyl) 2-amino benzimidazole

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Reaction Steps

A solution of 2-amino benzimidazole (4 g, or 0.030 mole) and triethylamine (4.2 ml, or 0,029 mole) in 70 ml of anhydrous tetrahydrofuran, is chilled to a temperature of between -5° and 0° C. To this solution is slowly added 4 g (0.030 mole) chloride of 2,4 hexadienoic acid in solution in 50 ml of anhydrous tetrahydrofuran. After being agitated, the mixture is left to return to ambiant temperature, after which it is poured into water. The precipitate is drained and washed with water. After recrystallization in toluene, 4.12 g (60% yield) is obtained of a crystallized compound having a melting point of 215° C. and the following structure (90% purity): ##STR4##

Provenance & Evidence