One-pot NHC-assisted access to 2,3-dihydropyrimido[4,5-d]pyrimidin-4(1H)-ones
作者:Mingxing Liu、Jiarong Li、Shu Chen、Danfei Huang、Hongxin Chai、Qi Zhang、Daxin Shi
DOI:10.1039/c4ra05346j
日期:——
2-(ethoxymethylene)malononitrile, guanidines (or amidines) and ketones (or aldehydes) has been developed. This highly efficient method includes a series of conversions such as Michael addition, cyclisation, isomerization, aromatization, then nucleophilic attack and Dimroth rearrangement. And it avoids complicated reagents and multiple steps.
由N-杂环卡宾辅助的一锅反应,由2-(乙氧基亚甲基)丙二腈,胍(或am)合成2,3-二氢嘧啶并[4,5- d ]嘧啶-4(1 H)-酮(或醛)已经开发出来。这种高效的方法包括一系列转化,例如迈克尔加成,环化,异构化,芳构化,亲核攻击和Dimroth重排。而且避免了复杂的试剂和多个步骤。