Oxazolinyl-Assisted C–H Amidation by Cobalt(III) Catalysis
作者:Ruhuai Mei、Joachim Loup、Lutz Ackermann
DOI:10.1021/acscatal.5b02661
日期:2016.2.5
Cobalt-catalyzed C–H activation by means of oxazolinyl assistance set the stage for versatile direct amidations with ample substrate scope. Thus, a high-valent cobalt(III) catalyst enabled C–H amidations with excellent levels of positional and chemo-selectivities. Mechanistic studies provided strong support for a kinetically relevant C–H functionalization.
A palladium-catalyzedC2-acylation of indoles with aryl and alkyl aldehydes via C–H functionalization is reported. The method shows excellent functional group tolerance and provides a straightforward way for the preparation of 2-aroylindoles.
Ir(I)‐Catalyzed C−H Glycosylation for Synthesis of 2‐Indolyl‐
<i>C</i>
‐Deoxyglycosides
作者:Changyue Yu、Yichu Liu、Xiong Xie、Shulei Hu、Shurui Zhang、Mingjie Zeng、Dan Zhang、Jiang Wang、Hong Liu
DOI:10.1002/adsc.202100855
日期:2021.11.9
we present an efficient, regioselective, stereoselective and widely applicable strategy for the synthesis of 2-indolyl-C-deoxyglycosides via Ir(I)-catalyzed, pyridine-group-directed C−H functionalization. This method exhibits high tolerance for the functional groups of indoles and the protecting groups of carbohydrates. Moreover, this protocol has good stereoselectivity and mainly produces β-configuration
Expedient C−H additions of heteroarenes onto aldimines were realized by a sustainable manganese catalysis manifold within a removable directing group strategy. The C−Hactivation features most user‐friendly reaction conditions, excellent chemo‐ and position‐selectivity as well as ample substrate scope. Detailed experimental mechanistic studies suggest an organometallic C−H manganesation mode of action
A versatile manganese(I) catalyst was employed in CH aminocarbonylation reactions of heteroarenes with aryl as well as with alkyl isocyanates using a removable directing group approach. Detailed experimental mechanistic studies were suggestive of an organometallic CH manganesation step, followed by a rate‐determining migratory insertion.