Rh(III)-catalyzed C−H alkylation of indolines with enones through conjugate addition and protonation pathway
作者:Hyunjung Oh、Jihye Park、Sang Hoon Han、Neeraj Kumar Mishra、Suk Hun Lee、Yongguk Oh、Mijin Jeon、Gyeong-Joo Seong、Ka Young Chung、In Su Kim
DOI:10.1016/j.tet.2017.06.052
日期:2017.8
The rhodium(III)-catalyzed C−H alkylations of indolines with enones and enals is described. This reaction can proceed through 1,4-conjugate addition and protonation process providing β-indolinic ketone compounds, which are known to be crucial scaffolds of biologically active compounds.
A hydroarylativecoupling of internalalkynes with indolines and tetrahydroquinolines has been developed using the bench‐stable and inexpensive ruthenium (II) catalyst. The applicability of this methodology has been demonstrated by the late stage functionalization of natural products, biologically active molecules, and APIs.
Synthesis of Active Hexafluoroisopropyl Benzoates through a Hydrogen-Bond-Enabled Palladium(II)-Catalyzed C−H Alkoxycarbonylation Reaction
作者:Yang Wang、Vladimir Gevorgyan
DOI:10.1002/anie.201611757
日期:2017.3.13
A PdII‐catalyzed ortho C−H alkoxycarbonylation reaction of aryl silanes toward active hexafluoroisopropyl (HFIP) benzoateesters has been developed. This efficient reaction features high selectivity and good functional‐group tolerance. Notably, given the general nature of the silyl‐tethered directing group, this method delivers products bearing two independently modifiable sites. NMR studies reveal
Ruthenium(II)-Catalyzed Direct C7-Selective Amidation of Indoles with Dioxazolones at Room Temperature
作者:Yaoguang Sheng、Jianmin Zhou、Yi Gao、Bingbing Duan、Yi Wang、Aleksandr Samorodov、Guang Liang、Qiuhua Zhao、Zengqiang Song
DOI:10.1021/acs.joc.0c02779
日期:2021.2.5
A protocol for the preparation of 7-amido indoles via regioselective C–H bond functionalization has been first accomplished under Ru(II) catalysis. Indole derivatives and 4-aryl/heteroaryl/benzyl/alkyl dioxzaolines containing various substituents were applicable for this transformation, readily providing the amidated indoles in moderate to good yields. This novel process has many advantages, including
Rhodium(III)‐Catalyzed Direct C7‐Selective Alkenylation and Alkylation of Indoles with Maleimides
作者:Yaoguang Sheng、Yi Gao、Bingbing Duan、Mengxia Lv、Yao Chen、Mengjie Yang、Jianmin Zhou、Guang Liang、Zengqiang Song
DOI:10.1002/adsc.202101055
日期:2022.1.18
A versatile and efficient method for the coupling of maleimides and indoles at the C7-position has been established under Rh(III) catalysis. The present protocol was compatible with various functional groups, diverse 3-(indol-7-yl)maleimides and 3-(indol-7-yl)succinimides were obtained in moderate to excellent yields by switching reaction conditions. Moreover, this method further highlights the unique