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.
Iodine-mediated synthesis of benzo[<i>a</i>]fluorenones from yne-enones
作者:Sikkandarkani Akbar、V. John Tamilarasan、Kannupal Srinivasan
DOI:10.1039/c9ra02376c
日期:——
The chalcones derived from o-alkynylacetophenones and aromatic aldehydes (yne-enones) when heated under reflux with iodine in acetic acid gave a range of benzo[a]fluorenone derivatives in moderate to good yields. The transformation involves the formation of a vinyl indenone intermediate through regioselective alkyne hydration and intramolecular aldol condensation followed by electrocyclic ring closure
衍生自邻炔基苯乙酮和芳族醛(炔-烯酮)的查耳酮在与碘在乙酸中加热回流时,会以中等至良好的产率生成一系列苯并[ a ]芴酮衍生物。该转化涉及通过区域选择性炔烃水合和分子内醛醇缩合形成乙烯基茚酮中间体,然后进行电环闭合和芳构化。