A transition-metal-free protocol for the difluoroalkylation of imidazopyridines with bromodifluoroaryl ketones promoted by visible light irradiation is presented. This protocol is distinguished by simple, mild, and catalyst-free reaction conditions with a wide reaction scope, which is complementary to existing difluoroalkylation strategies by photoredox scenarios. Additionally, this protocol potentially
The arylation of imidazo[1,2‐a]pyridine and benzo[d]imidazo[2,1‐b]thiazoles by using diaryliodonium salts has been developed. Potassium tert‐butoxide was used to promote this transition‐metal‐free reaction, which afforded the corresponding products in good to excellent yields.
咪唑的芳基化[1,2一]吡啶和苯并[ d ]咪唑并[2,1- b ]通过使用二芳基碘盐已经开发噻唑。钾叔丁醇是用来促进此过渡金属无反应,得到相应的产品以良好至优异的产量。
Exogenous-oxidant-free electrochemical oxidative C–H phosphonylation with hydrogen evolution
作者:Yong Yuan、Jin Qiao、Yangmin Cao、Jingmei Tang、Mengqin Wang、Guojuan Ke、Yichen Lu、Xue Liu、Aiwen Lei
DOI:10.1039/c9cc00975b
日期:——
We herein report a versatile and environmentally friendly electrochemical oxidative C–H phosphonylation protocol.
我们在此报告一种通用且环境友好的电化学氧化C-H磷酰化协议。
On water catalyst-free synthesis of benzo[<i>d</i>]imidazo[2,1-<i>b</i>] thiazoles and novel <i>N</i>-alkylated 2-aminobenzo[<i>d</i>]oxazoles under microwave irradiation
作者:Narasimharao Mukku、Barnali Maiti
DOI:10.1039/c9ra08929b
日期:——
unprecedented catalyst-free microwave-assisted procedure for synthesizing benzo[d]imidazo[2,1-b]thiazoles and N-alkylated 2-aminobenzo[d]oxazol in green media was developed. The transformation provided rapid access to functionalized benzo[d]imidazo[2,1-b]thiazoles from 2-aminobenzothiazole and N-alkylated 2-aminobenzo[d]oxazole from 2-aminobenzoxazole scaffolds under mild transition-metal-free conditions. This
开发了一种前所未有的高效无催化剂微波辅助方法,用于在绿色介质中合成苯并[ d ]咪唑并[ 2,1- b ]噻唑和N-烷基化 2-氨基苯并[ d ]恶唑。该转化提供了在温和的无过渡金属条件下从 2-氨基苯并噻唑和N-烷基化 2-氨基苯并[ d ]恶唑快速获得功能化苯并[ d ]咪唑[ 2,1- b ]噻唑的途径。这种合成操作有望极大地扩展杂环化学中反应类型的全部内容,并为生物活性化合物的新合成铺平道路。
Visible light triggered, catalyst free approach for the synthesis of thiazoles and imidazo[2,1-b]thiazoles in EtOH : H<sub>2</sub>O green medium
作者:Anu Mishra、Madhulika Srivastava、Pratibha Rai、Snehlata Yadav、Bhartendu Pati Tripathi、Jaya Singh、Jagdamba Singh
DOI:10.1039/c6ra05385h
日期:——
The development of a visible light promoted, mild and greener approach for the synthesis of highly functionalized thiazoles and imidazo[2, 1-b]thiazoles under photochemical activation in EtOH:H2O green medium is demonstrated....