Synthesis of Benzimidazole Ketene<b><i>N</i></b>,<b><i>S</i></b>-Acetals and Their Reactions with Nucleophiles
作者:Galal H. Elgemeie、Hosny A. Ali、Ahmed H. Elghandour、Ahmed M. Hussein
DOI:10.1081/scc-120015809
日期:2003.1.4
Abstract The novel ketene thioacetal 4 and ketene N,S-acetal 5 were readily prepared by the reaction of 2-cyanomethylbenzimidazole with either carbon disulfide or phenyl isothiocyanate in the presence of a base, followed by alkylation of the produced salts with methyl iodide. The reaction of compounds 4 and 5 with hydrazines afforded different benzimidazolyl substituted pyrazoles.
摘要 通过 2-氰基甲基苯并咪唑与二硫化碳或异硫氰酸苯酯在碱存在下反应,然后用甲基碘对生成的盐进行烷基化,可以很容易地制备新的乙烯酮硫缩醛 4 和乙烯酮 N,S-缩醛 5。化合物4和5与肼反应得到不同的苯并咪唑基取代的吡唑。