Pd-Catalyzed cascade cyclization of <i>o</i>-alkynylanilines <i>via</i> C–H/C–N bond cleavage leading to dibenzo[<i>a</i>,<i>c</i>]carbazoles
作者:Sheng Zhang、Hengmin Ma、Hon Eong Ho、Yoshinori Yamamoto、Ming Bao、Tienan Jin
DOI:10.1039/c8ob01386a
日期:——
A new and efficient Pd-catalyzed cascade cyclization of biaryl-tethered o-alkynylanilines for the formation of dibenzo[a,c]carbazole derivatives has been reported.
A Novel Synthetic Route to 3-Sulfenyl- and 3-Selenylindoles by <i>n</i>-Bu<sub>4</sub>NI-Induced Electrophilic Cyclization
作者:Yu Chen、Chul-Hee Cho、Richard C. Larock
DOI:10.1021/ol8021287
日期:2009.1.1
3-Sulfenyl- and 3-selenylindoles are prepared In excellent yields by the palladium/copper-catalyzed crossing coupling of N,N-dialkyl-o-iodoanilines and terminal alkynes, followed by electrophilic cyclization with arylsulfenyl chlorides and arylselenyl chlorides in the presence of a stoichiometric amount of n-Bu4NI.