C-Acylation of N-substituted imidazoles with ethyl oxalyl chloride in the presence of N,N-diisopropylethylamine as a base afforded 2-(2-ethoxy-1,2-dioxoethyl)imidazoles in 83-95% yield. Application of this synthetic protocol to thiazoles and triazoles led to the corresponding 2-ethoxy-1,2-dioxoethyl derivatives in 40-51% yield.
在
N,N-二异丙基乙胺作为碱的存在下,N-取代
咪唑与乙氧基
草酰氯进行C-酰化反应,得到了产率为83-95%的2-(2-乙氧基-1,2-二氧乙基)
咪唑。应用这一合成方案于
噻唑和三唑,分别得到了相应产率为40-51%的2-乙氧基-1,2-二氧乙基衍
生物。