Efficient synthesis of substituted thieno[3,2-e]indoles
作者:Wim Van Snick、Wim Dehaen
DOI:10.1016/j.tet.2009.08.031
日期:2009.10
giving 7- and 8-substituted thieno[3,2-e]indoles, are described. The reaction of 4-iodo-5-(methylsulfonamido)benzothiophene with terminal alkynes gave 7-substituted thienoindoles using general Sonogashira reaction conditions. Reaction of 5-amino-4-iodobenzothiophene with internal acetylenes, using Larock's heterocyclization reaction conditions, gave 7,8-disubstituted thieno[3,2-e]indoles.
描述了5-氨基苯并噻吩衍生物与内部和末端乙炔的有效环化反应,得到7-和8-取代的噻吩并[3,2- e ]吲哚。使用常规的Sonogashira反应条件,4-碘-5-(甲基磺酰胺基)苯并噻吩与末端炔烃的反应得到7-取代的噻吩并吲哚。5-氨基-4-碘苯并噻吩与内部乙炔的反应,使用Larock的杂环反应条件,得到7,8-二取代的噻吩并[3,2- e ]吲哚。
A Facile Synthetic Route towards
Substituted Thieno[3,2-<i>e</i>]indoles
作者:Wim Dehaen、Wim Van Snick、Wienand Nulens、Sarah Jambon
DOI:10.1055/s-0028-1083366
日期:——
A number of substituted thieno[3,2-e]indoles have been prepared in high yields via a tetrabutylammonium fluoride mediated cyclization of 5-acetamido-4-ethynylbenzothiophenes, which, in turn, are easily accessible from the corresponding 4-iodobenzothiophenes. This method presents a viable alternative to the traditionally used Fischer indolization procedures. thienoindoles - palladium - cyclizations
已经通过四丁基铵氟化物介导的5-乙酰氨基-4-乙炔基苯并噻吩的环化反应以高收率制备了许多取代的噻吩并[3,2- e ]吲哚,这又可以容易地从相应的4-碘苯并噻吩获得。该方法提供了一种替代传统使用的费歇尔吲哚化方法的可行方法。 噻吩并吲哚-钯-环化-稠环系统-氟化四丁基铵