Synthesis of 2-Acylated Indoles through Palladium-Catalyzed Dehydrogenative Coupling of N-Pyrimidine-Protected Indoles with Aldehydes and Ethyl Glyoxylate
作者:Ze Tan、Wenduo Wang、Jidan Liu、Qingwen Gui
DOI:10.1055/s-0034-1379935
日期:——
C2-Acylated indoles have been synthesized in good yields through palladium-catalyzed dehydrogenative coupling of N -pyrimidine-protected indoles using aldehydes as the source of acyl reagent and tert -butyl hydroperoxide as the oxidant. 2-Indole carboxylates can be synthesized when aldehydes are substituted by ethyl glyoxylate.
RhCl<sub>3</sub>·3H<sub>2</sub>O-Catalyzed Regioselective C(sp<sup>2</sup>)–H Alkoxycarbonylation: Efficient Synthesis of Indole- and Pyrrole-2-carboxylic Acid Esters
作者:Kang Zhao、Rongrong Du、Bingyang Wang、Jianhua Liu、Chungu Xia、Lei Yang
DOI:10.1021/acscatal.9b01193
日期:2019.6.7
The C2-selective C–H alkoxycarbonylation of indoles with alcohols and CO catalyzed by RhCl3·3H2O is disclosed that offers convenient access to diverse indole-2-carboxylic esters. The rhodium-based catalysts outperformed all other precious-metal catalysts investigated. In addition, this protocal was found applicable to the synthesis of pyrrole-2-carboxylic esters, and allowed the C–H alkoxycarbonylation
Palladium-Catalyzed Direct Alkoxycarbonylation of Aromatic CH Bonds<i>via</i>Selective CC Cleavage of α-Keto Esters
作者:Wei Zhou、Pinhua Li、Yicheng Zhang、Lei Wang
DOI:10.1002/adsc.201300436
日期:2013.8.12
AbstractA novel palladium‐catalyzed direct alkoxycarbonylation of 2‐arylpyridines, 2‐arylquinolines, benzo[h]quinolines, 2‐phenylpyrimidines, N‐pyrimidine pyrroles and N‐pyrimidine indoles via aromatic CH bond activation and selective CC cleavage of α‐keto esters has been developed. The method has the advantages of wide functional group tolerance, high selectivity, broad range of substrates and good yields.magnified image