The amine exchange/biaryl coupling sequence: a direct entry to the phenanthro[9,10-d]heterocyclic framework
作者:Roberto Olivera、Raul SanMartin、Imanol Tellitu、Esther Domı́nguez
DOI:10.1016/s0040-4020(02)00194-1
日期:2002.4
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。