The Mannich Reaction of Hydrazones Amenable to Solid Phase Synthesis: A Powerful Tool for Heterocycle Preparation
作者:Valérie Atlan、Laurent Elkaim、Laurence Grimaud、Nirmal K. Jana、Adinath Majee
DOI:10.1055/s-2002-19745
日期:——
The Mannich reaction of hydrazones with aldehydes and benzylpiperazine yields functionalised hydrazones, which are efficient azoalkene precursors. When the hydrazonopiperazines are thus heated with various isocyanides in the presence of dibromoethane, 5-aminopyrazoles are cleanly formed. The choice of benzylpiperazine in the Mannich reaction allows a simple extension of this reaction to solid phase chemistry.
肼酮与醛和苄基哌嗪的马尼希反应可得功能化的肼酮,这些肼酮是高效的偶氮烯前体。当肼酮哌嗪与各种异氰酸酯在二溴乙烷存在下加热时,可以干净地生成5-氨基吡唑。在马尼希反应中选择苄基哌嗪使该反应能够简单扩展到固相化学。