A new and facile synthesis of imidazo[2,1-<i>b</i>]oxazoles
作者:Belew Mekonnen、George Crank、Donald Craig
DOI:10.1002/jhet.5570340241
日期:1997.3
An efficient and clean two step procedure for the synthesis of imidazo[2,1-b]oxazoles has been developed from 2-aminooxazoles using titanium(IV) chloride assisted cyclization, and a variety of imidazo[2,1-b]oxazoles have been synthesized in good yields. The structure of one of the products was confirmed by X-ray crystallographic analysis.
利用氯化钛(IV)辅助环化反应,从2-氨基恶唑开发了一种高效,清洁的两步合成咪唑并[ 2,1- b ]恶唑的方法,各种咪唑并[ 2,1- b ]恶唑具有以高收率合成。通过X射线晶体学分析证实了一种产物的结构。
Electrophilic substitution of imidazo[2,1-b]oxazoles
作者:Belew Mekonnen、George Crank
DOI:10.1016/s0040-4020(97)00395-5
日期:1997.5
The electrophilic substitutions of di and tri substituted imidazo[2,1-b]oxazoles were studied. Mannich, bromination, nitration, and the Vilsmeier-Haack formylation reactions occur at position-5 of this ring system to give a range of products in high yield.
研究了二和三取代的咪唑并[2,1- b ]恶唑的亲电取代。曼尼希(Mannich),溴化,硝化和Vilsmeier-Haack甲酰化反应发生在该环系统的5位,从而提供了一系列高收率的产品。