Ruthenium Catalyzed Directing Group-Free C2-Selective Carbenoid Functionalization of Indoles by α-Aryldiazoesters
作者:Wai-Wing Chan、Shing-Hin Yeung、Zhongyuan Zhou、Albert S. C. Chan、Wing-Yiu Yu
DOI:10.1021/ol9028226
日期:2010.2.5
A directing group-free approach for C2-selective carbenoid functionalization of NH-indoles is presented. Using [RuCl2(p-cymene)](2) as catalyst and alpha-aryldiazoesters as carbenoid source, 2-alkylated indoles were obtained in up to 96% isolated yield. Similarly, a regioselective carbenoid functionalization of NH-pyrroles was also achieved.
Modular Divergent Synthesis of Functionalized Indoles via TFA-Promoted Amino-Claisen Rearrangement at Room Temperature
作者:Yuxi Zhang、Yicheng He、Teng Liu、Wusheng Guo
DOI:10.1021/acs.orglett.3c00764
日期:2023.4.21
A conceptually novel approach for the modular and divergent synthesis of highly functionalized indoles via trifluoroacetic acid-promoted amino-Claisenrearrangement is reported. This metal-free protocol could be performed at room temperature with wide functional group tolerance. The substitution type of the resultant indoles could be easily adjusted by the variation of the starting propargyl amines