Green, Catalyst-Free Reaction of Indoles with β-Fluoro-β-nitrostyrenes in Water
作者:Alexander S. Aldoshin、Andrey A. Tabolin、Sema L. Ioffe、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201800385
日期:2018.8.1
The reaction of 2‐fluoro‐2‐nitrostyrenes with various indoles was investigated. We found that the reaction proceeds as a Michael addition in a highly regioselective manner to form 3‐(1‐aryl‐2‐fluoro‐2‐nitroethyl)‐1H‐indoles. Thus, a green and catalyst‐free synthesis of these compounds was developed using water as a reaction medium. The high effectiveness of this approach was demonstrated through the
作者:Alexander S. Aldoshin、Andrey A. Tabolin、Sema L. Ioffe、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201900573
日期:2019.7.23
A new procedure for preparation of a previously unknown class of monofluorinated 3‐vinyl indoles is reported. This strategy is based on a one‐pot two‐step process involving a preliminary uncatalyzed Michael addition of β‐fluoro‐β‐nitrostyrenes to indoles followed by a base‐induced elimination of nitrous acid. The unique role of fluorine for realization of this process was demonstrated.