methylene compounds to yield the 1-(3-phenylpyrazol-5-yl)-pyrazole derivatives 2a–k (Scheme 1). The acyclic intermediates 3a,b could be isolated from reaction of 1a,b with acetylacetone, thus establishing the substitution mechanism for these reactions.
碳(
3-苯基吡唑-5-基-
肼基酰基)卤化物1a,b与活性亚甲基化合物反应以产生1-(
3-苯基吡唑-5-基)-
吡唑衍
生物2a - k(方案1)。无环中间体3a,b可从1a,b与
乙酰丙酮的反应中分离,从而建立这些反应的取代机理。