Efficient microwave-assisted one-pot three-component synthesis of 2,3-disubstituted benzofurans under Sonogashira conditions
作者:Nataliya A. Markina、Yu Chen、Richard C. Larock
DOI:10.1016/j.tet.2013.02.003
日期:2013.4
efficient one-pot method for the synthesis of 2,3-disubstituted benzo[b]furans from commercially available 2-iodophenols, terminal acetylenes and aryl iodides has been developed utilizing Sonogashira reaction conditions. After an initial Sonogashira coupling of the 2-iodophenol with the terminal alkyne, cyclization involving the aryl iodide provides the 2,3-disubstituted benzo[b]furan in good to excellent
Acid-promoted furan annulation and aromatization: An access to benzo[ b ]furan derivatives
作者:Jun Ao、Yidong Liu、Shiqi Jia、Lu Xue、Dongmei Li、Yu Tan、Wenling Qin、Hailong Yan
DOI:10.1016/j.tet.2017.11.049
日期:2018.1
An unprecedented PTSA-promoted furan annulation and aromatization in one pot has been developed. This process offers a simple and efficient synthetic route for the construction of various highly substituted benzo[b]furan derivatives, which are widely used not only in drug active molecules but also organic semiconductor and organic light-emitting devices. The preliminary mechanism study indicated this
在一个锅中开发了前所未有的PTSA促进的呋喃环化和芳构化。该方法为构建各种高度取代的苯并[ b ]呋喃衍生物提供了简单而有效的合成途径,这些苯并[ b ]呋喃衍生物不仅广泛用于药物活性分子中,而且还广泛用于有机半导体和有机发光器件中。初步的机理研究表明,该转化通过呋喃环化和芳构化依次进行。
Direct Arylation of Benzo[<i>b</i>]furan and Other Benzo-Fused Heterocycles
作者:Toan Dao-Huy、Maximilian Haider、Fabian Glatz、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1002/ejoc.201403125
日期:2014.12
The directarylation of benzo[b]furan, benzo[b]thiophene, and indole has been studied by using aromatic bromides as the aryl source. The protocol employing common reagents and a Pd catalyst has led to the regioselective arylation of these heterocycles at the 2-position. A range of functional groups were tolerated, providing quick access to a variety of arylated benzo-fusedheterocycles that would be
A novel Cu-catalyzed intramolecular aryl-etherification reaction of alkoxyl alkynes with diaryliodonium salts is realized. The reactions proceed smoothly to produce valuable oxo-heterocycles with readily available linear starting materials via cleavage of a stable C-O bond.