Novel and Selective Palladium-Catalyzed Annulations of 2-Alkynylphenols To Form 2-Substituted 3-Halobenzo[<i>b</i>]furans
作者:Yun Liang、Shi Tang、Xu-Dong Zhang、Li-Qiu Mao、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1021/ol060908f
日期:2006.7.1
[reaction: see text] A novel and selective palladium-catalyzed annulation of 2-alkynylphenols method for the synthesis of 2-substituted 3-halobenzo[b]furans is presented. In the presence of PdX(2), CuX(2), and HEt(3)NX, 2-substituted 3-halobenzo[b]furans were selectively obtained as the major products. The mechanism of the reaction was also discussed.
Trichloroisocyanuric Acid (TCCA): A Suitable Reagent for the Synthesis of Selanyl‐benzo[
<i>b</i>
]chalcogenophenes
作者:Gustavo B. Blödorn、Luis Fernando B. Duarte、Juliano A. Roehrs、Márcio S. Silva、José S. S. Neto、Diego Alves
DOI:10.1002/ejoc.202200775
日期:2022.10.26
A new protocol for the synthesis of different 3-organyl-benzo[b]chalcogenophenes was developed through the reaction of diorganyl diselenides with trichloroisocyanuric acid (TCCA) in ethanol. Under the optimized reaction conditions, a range of benzo[b]furans, benzo[b]thiophenes and benzo[b]selenophenes were synthesized in good to excellent yields using mild reaction conditions.
通过二有机基二硒化物与三氯异氰脲酸 (TCCA) 在乙醇中的反应,开发了一种合成不同 3-有机基苯并[ b ]硫族酚的新方案。在优化的反应条件下,一系列苯并[ b ]呋喃、苯并[ b ]噻吩和苯并[ b ]硒吩类化合物在温和的反应条件下以良好至优异的收率合成。
Palladium-Catalyzed Tandem Annulation: A Strategy To Construct 2,3-Difunctionalized Benzofuran Derivatives in Ionic Liquids
An efficient and ecofriendly method for the construction of 2,3-difunctionalized benzofuran derivatives in moderate to good yields from readily available 2-alkynylphenols has been developed. This tandem annulation process, featuring one pot, three steps, good functional group tolerance, and high atom economy, makes this transformation efficient and practical. Moreover, this protocol is scalable, illustrating its potential applications in synthetic and pharmaceutical chemistry.