Au-promoted Pd-catalyzed arylative cyclization of N,N-dimethyl-o-alkynylaniline with aryl iodides: Access to 2,3-diaryl indoles and mechanistic insight
quater‐heteroaryls have been prepared under indium catalysis by nucleophilicaromaticsubstitution (SNAr). This is the first example of catalytic heteroaryl–heteroaryl bond formation based on SNAr between two heteroaryl substrates without needing activating groups to enhance their reactivity (see scheme; El=electrophile, In=In(OTf)3 or In(ONf)3, Nu=nucleophile).
独特的性能:在铟催化下,通过亲核芳族取代(S N Ar)制备了二,三和四杂杂芳基。这是基于两个杂芳基底物之间基于S N Ar的催化杂芳基-杂芳基键催化形成的第一个示例,无需活化基团来增强其反应性(参见方案; El =亲电子试剂,In = In(OTf)3或In(ONf)3,Nu =亲核试剂)。
Palladium-catalyzed synthesis of 2,3-disubstituted indoles <i>via</i> arylation of <i>ortho</i>-alkynylanilines with arylsiloxanes
作者:Yang-Ting Hsia、Yu-Lin Lu、Rekha Bai、Satpal Singh Badsara、Chin-Fa Lee
DOI:10.1039/d3ob00961k
日期:——
study, we report the electrophiliccyclization of N,N-dimethyl-o-alkynylanilines with arylsiloxanes in the presence of [Pd(OAc)2] and Ag2O catalytic system, which leads to the efficient synthesis of indoles, similar to the one that is obtained through Larock indole synthesis. A range of aryl(trimethoxy)silanes with EDGs and EWGs were successfully utilized for the synthesis of a diverse variety of substituted