Generation of 3-(1H-pyrrol-3-yl)-1H-inden-1-ones via a tandem reaction of 1-(2-alkynylphenyl)-2-enone, 2-isocyanoacetate, and water
作者:Danqing Zheng、Shaoyu Li、Jie Wu
DOI:10.1039/c2cc34509a
日期:——
A silver triflate-catalyzed tandem reaction of 1-(2-alkynylphenyl)-2-enone, 2-isocyanoacetate, and water provides a novel and efficient route for the delivery of 3-(1H-pyrrol-3-yl)-1H-inden-1-ones. Four bonds are formed during the tandem process.
Base-controlled 1,6-enyne-bicyclization: divergent synthesis of benzo[b]fluorenones and benzo[b]fluorenols
作者:Wen-Juan Hao、Peng Zhou、Zheng Yang、Bo Jiang、Jin-Peng Zhang、Shu-Jiang Tu
DOI:10.1016/j.tet.2016.03.026
日期:2016.4
interesting base-controlled protocol for the divergent and atom-economic synthesis of benzo[b]fluorenones and benzo[b]fluorenols with the great diversity in substitution patterns has been developed. Started from readily available 1,6-enynes, good to excellent yields of the corresponding tetracyclic benzo[b]fluorenones and benzo[b]fluorenols can be chemoselectively achieved under metal-free conditions
已经开发出一种有趣的碱控制方案,用于发散和原子经济合成苯并[ b ]芴酮和苯并[ b ]芴醇,其取代方式具有很大的多样性。从容易获得的1,6-烯炔开始,可以在无金属条件下化学选择性地获得相应的四环苯并[ b ]芴烯和苯并[ b ]芴醇的良好或优异的产率。值得注意的是,这里仅需要K 2 CO 3或Et 3 N作为促进剂,并且该反应可以以高选择性的方式很好地进行。