An efficient one pot multi-component sequential reaction of phenyl hydrazine, malanonitrile and a diverse range of aldehydes to afford highly functionalised pyrazoles is reported. The reaction proceeds in water using molecular iodine as a catalyst, with no by-product formation, and involves simple operation requiring no column chromatography. Thus, this protocol fulfils all of the criteria that define green chemistry.
据报道,苯基
肼、
丙二腈和多种
醛类可进行高效的一锅多组分顺序反应,生成高度官能化的
吡唑。反应在
水中进行,使用分子
碘作为催化剂,没有副产品生成,操作简单,无需柱层析。因此,该方案符合绿色
化学的所有标准。