Microwave irradiated synthesis of 2-bromo(chloro)indoles via intramolecular cyclization of 2-(gem-dibromo(chloro)vinyl)anilines in the presence of TBAF under metal-free conditions
作者:Min Wang、Pinhua Li、Wei Chen、Lei Wang
DOI:10.1039/c4ra00603h
日期:——
2-Bromo(chloro)indoles were readily prepared through TBAF-promoted intramolecular cyclization of 2-(gem-dibromo(chloro)vinyl)anilines in excellent yields under metal-free and microwave irradiation conditions.
The synthesis of chromeno[2,3‐b]indolefrom simple starting materials remains a demanding process. Herein, 2‐bromoindole undergoes nucleophilic attack from salicylaldehyde, followed by intramolecular insertion of an aldehyde group and aromatization to generate the desired chromeno[2,3‐b]indoles. Moreover, various functional groups were tolerated and a gram‐scale synthesis of the product could be achieved
由简单的起始原料合成苯并[2,3-b]吲哚仍然是一个艰巨的过程。在此,2-溴吲哚经历了水杨醛的亲核攻击,随后在分子内插入醛基并进行芳构化以生成所需的chromeno [2,3- b ]吲哚。此外,可以容忍各种官能团,并且在最佳条件下可以实现克级的产物合成。
The facile synthesis of 2-bromoindoles via Cs<sub>2</sub>CO<sub>3</sub>-promoted intramolecular cyclization of 2-(gem-dibromovinyl)anilines under transition-metal-free conditions
作者:Pinhua Li、Yong Ji、Wei Chen、Xiuli Zhang、Lei Wang
DOI:10.1039/c2ra22172a
日期:——
2-Bromoindoles were readily prepared through a facile Cs2CO3-promoted intramolecular cyclization of 2-(gem-bromovinyl)-N-methylsulfonylanilines in excellent yields under transition-metal-free conditions. This methodology could be extended to the synthesis of corresponding 2-chloroindoles. The reaction mechanism suggested that cyclization occurs through a key intermediate, phenylethynyl bromide, followed by cyclization in one-pot.
Novel benzofuran-3-one indole inhibitors of PI3 kinase-α and the mammalian target of rapamycin: Hit to lead studies
作者:Matthew G. Bursavich、Natasja Brooijmans、Lawrence Feldberg、Irwin Hollander、Stephen Kim、Sabrina Lombardi、Kaapjoo Park、Robert Mallon、Adam M. Gilbert
DOI:10.1016/j.bmcl.2010.02.082
日期:2010.4
A series of benzofuran-3-one indole phosphatidylinositol-3-kinases (PI3K) inhibitors identified via HTS has been prepared. The optimized inhibitors possess single digit nanomolar activity against p110 alpha (PI3K-alpha), good pharmaceutical properties, selectivity versus p110 gamma (PI3K-gamma), and tunable selectivity versus the mammalian target of rapamycin ( mTOR). Modeling of compounds 9 and 32 in homology models of PI3K-alpha and mTOR supports the proposed rationale for selectivity. Compounds show activity in multiple cellular proliferation assays with signaling through the PI3K pathway confirmed via phospho-Akt inhibition in PC-3 cells. (C) 2010 Elsevier Ltd. All rights reserved.