Palladium-Assisted Regioselective C–H Cyanation of Heteroarenes Using Isonitrile as Cyanide Source
作者:Shuguang Xu、Xiaomei Huang、Xiaohu Hong、Bin Xu
DOI:10.1021/ol302070t
日期:2012.9.7
A palladium-catalyzedregioselectiveC–Hcyanation of heteroarenes was achieved using tert-butyl isocyanide as “CN” source, which provides a new and unique strategy for the preparation of (hetero)aryl nitriles. Indoles, pyrroles, and aromatic rings could be efficiently cyanated through C–Hbondactivation with high regioselectivity.
Cp*Co<sup>III</sup>-Catalyzed Synthesis of Pyrido[2′,1′:2,3]pyrimido[1,6-<i>a</i>]indol-5-iums via Tandem C–H Activation and Subsequent Annulation from 1-(Pyridin-2-yl)-1<i>H</i>-indoles and Internal Alkynes
作者:Yuhan Yang、Bo Li、Wenmin Liu、Rumeng Zhang、Lintao Yu、Qin-Ge Ma、Rongrong Lv、Donghua Du、Ting Li
DOI:10.1021/acs.joc.6b02314
日期:2016.11.18
of 1-(pyridin-2-yl)-1H-indoles with internal alkynes to afford pyrido[2′,1′:2,3]pyrimido[1,6-a]indol-5-iums is presented. Moreover, 6,7-dihydro-4H-pyrido[2′,1′:2,3]pyrimido[1,6-a]indole, a new functionalized N-fused indole core heterocycle, could be constructed effectively via reduction of pyrido[2′,1′:2,3]pyrimido[1,6-a]indol-5-ium by NaBH4.
Cp * Co III催化的1-(吡啶-2-基)-1 H-吲哚与内部炔烃的C2选择性C–H链烯基化/环化级联转化,可得到吡啶基[2',1':2,3]介绍了嘧啶基[1,6- a ]吲哚-5-鎓。此外,可以通过还原反应,有效地构建6,7-二氢-4 H-吡啶基[2',1':2,3]嘧啶基[1,6- a ]吲哚,一种新型的功能化的N稠合吲哚核杂环。NaBH 4引发吡啶并[2',1':2,3]嘧啶并[1,6 - a ]吲哚-5-鎓。
C–H Bond Sulfonylation from Thianthrenium Salts and DABCO·(SO2)2: Synthesis of 2-Sulfonylindoles
作者:Chen Guo、Xinhua Wang、Qiuping Ding、Jie Wu
DOI:10.1021/acs.joc.4c00827
日期:2024.7.5
and thianthrenium salts under synergistic photoredox and palladium catalysis is accomplished. This direct C–H bond sulfonylation of indoles with the insertion of sulfur dioxide under mild conditions works efficiently, giving rise to a wide range of 2-sulfonated indoles in moderate to good yields under mild conditions. In this protocol, the generality of aryl/alkyl thianthrenium salts is demonstrated