Diversity-oriented pyrazol-3-one synthesis based on hydrazinodipeptide-like units prepared via the Ugi reaction
作者:Ekaterina Lakontseva、Mikhail Krasavin
DOI:10.1016/j.tetlet.2010.05.133
日期:2010.8
N-Cyanoacetyl-N′-trifluoroacetyl-N′-alkylhydrazines, prepared via hydrazino-Ugi reaction, provided different pyrazol-3-ones when exposed to mildly acidic and mildly basic conditions at 60 °C. These approaches offer a facile access to two different pyrazol-3-one-containing chemotypes in a diversity-oriented fashion, in only two chemical operations from simple precursors.
通过肼基-Ugi反应制备的N-氰基乙酰基-N'-三氟乙酰基-N'-烷基肼在60°C的弱酸性和弱碱性条件下提供了不同的吡唑3-酮。这些方法提供了以多样性为导向的方式轻松访问两种不同的含吡唑-3-一的化学型,而这仅是简单前体的两种化学操作。