2-(Bromoacetyl)-5-chlorothiophene → 1-[(E)-(4-chlorophenyl)methylideneamino]-4-(5-chlorothiophen-2-yl)imidazol-2-amine

Participants

Reaction Steps

A solution of 2-bromo-1-(5-chloro-2-thienyl)-1-ethanone (1.07 g, 4.49 mmol), 2-[(E)-1- (4-chlorophenyl)methylidene]-1-hydrazinecarboximidamide (1.77 g, 8.98 mmol) was heated in ethanol (10 mL) for 2 h, then the mixture was left at room temperature for additional 10 h. The precipitate filtered, washed with hot water, and recrystallized from ethanol to give N1-[(E)-1-(4-chlorophenyl)methylidene]-4-(5-chloro-2-thienyl)-1H-1,2-imidazolediamine 2 (1.09 g, 72%) as a brown solid.

Provenance & Evidence