An improved synthesis of 1,2-benzisoxazoles: TBAF mediated 1,3-dipolar cycloaddition of nitrile oxides and benzyne
作者:Christian Spiteri、Pallavi Sharma、Fengzhi Zhang、Simon J. F. Macdonald、Steve Keeling、John E. Moses
DOI:10.1039/b922489k
日期:——
An efficient synthesis of a range of 1,2-benzisoxazoles using an improved 1,3-dipolar cycloaddition of nitrile oxides and benzyne is described. Key to the procedure is the in situ generation of the reactive nitrile oxide and benzyne reaction partners mediated by TBAF. Reactions are complete within 30 s, giving the target products in good to excellent yield.
描述了使用改进的腈和苯炔的1,3-偶极环加成反应,有效合成一系列1,2-苯并恶唑类化合物的方法。该过程的关键是由TBAF介导的原位生成反应性一氧化氮和苯炔反应伙伴。反应在30 s内完成,使目标产物具有良好或极好的收率。