Reaktionen von 2-Methyl-1H-benzimidazol mit Schwefelkohlenstoff und Phenylisothiocyanat. Kristall- und Molekülstruktur von 1,1′ -Carbonothioyl-bis(2-methyl-1H-benzimidazol) und 2-Methyl-1-(ethoxycarbonylmethylthio-phenylimino)-1H-benzimidazol / Reactions of 2-Methyl-1 H-benzimidazole with Carbon Disulfide and Phenyl Isothiocyanate. Molecular and Crystal Structures of 1,1′-Carbonothioyl-bis(2-methyl-1 H-benzimidazole) and 2-Methyl-1-(ethoxycarbonylmethylthio-phenylimino)-1 H-benzimidazole

Abstract

Abstract 2-Methyl-1 H-benzimidazole 1 reacts in the presence of two equivalents of sodium hydride in dry DMSO with carbon disulfide to methyl 2-methylbenzimidazole-1-dithiocarboxylate 3 using methyl iodide as alkylating agent, whereas using 1,2-dibromoethane 1,1′-carbonothioyl bis(2-methyl-1 H-benzimidazole) 5 is formed. Compound 1 reacts with phenyl isothiocyanate in the presence of one equivalent of sodium hydride in dry DMF after alkylation to 2-methyl-1-( alkylthio-phenylimino)-1 H-benzimidazoles 6a, 6b. Reaction products 5 and 6b have been identified and structurally characterized by X-ray analysis.