Synthesis of Benzo[<i>b</i>]furans via CuI-Catalyzed Ring Closure
作者:Cheng-yi Chen、Peter G. Dormer
DOI:10.1021/jo050788+
日期:2005.8.1
A wide variety of benzo[b]furans were synthesized efficiently via a CuI-catalyzed ringclosure of 2-haloaromatic ketones. The methodology was tolerant to various functional groups, affording benzofurans in 72−99% yields.
通过CuI催化的2-卤代芳族酮的闭环反应,可以高效合成各种苯并[ b ]呋喃。该方法可耐受各种官能团,可提供72-99%的产率的苯并呋喃。
The amine exchange/biaryl coupling sequence: a direct entry to the phenanthro[9,10-d]heterocyclic framework
Novel phenanthro[9,10-d]pyrimidines and phenanthro[9,10-d][1,2]oxazoles are regioselectively prepared by the application of a straightforward synthetic pathway, starting from new o,o′-dihalogenated and non-halogenated 4,5-diarylpyrimidines and 4,5-diarylisoxazoles, respectively, prepared via a tandem amine exchange/heterocyclization of diarylenaminones. A comparative study of biaryl coupling methodologies
新型菲[9,10- d ]嘧啶和菲[9,10- d ] [1,2]恶唑是通过从新的o,o开始的直接合成途径进行区域选择性制备的经由串联芳胺交换/二芳基氨基酮制备的′-二卤代和非卤代4,5-二芳基嘧啶和4,5-二芳基异恶唑。对联芳基偶联方法的比较研究提供了两个高效,互补的程序来完成最后的偶联步骤:分子内的Stille-Kelly卤代二芳基嘧啶和二芳基异恶唑的甲锡烷基化/偶联,以及相应非磷酸酯基的PIFA介导的非酚氧化偶联卤化的底物。此外,还研究了针对相同目标四环系统的其他替代方法。