We report the direct amidation of arene C-H bonds using sulfonyl azides as the amino source to release N(2) as the single byproduct. The reaction is catalyzed by a cationic rhodium complex under external oxidant-free conditions in the atmospheric environment. A broad range of chelate group-containing arenes are selectively amidated with excellent functional group tolerance, thus opening a new avenue
Manganese-Catalyzed C−H Amidation of Heteroarenes in Water
作者:Xianqiang Kong、Long Lin、Bo Xu
DOI:10.1002/adsc.201800544
日期:2018.8.6
We have developed an efficient manganese‐catalyzed amidation of various heteroarenes via C−H bond activation using readily available sulfonyl azides. The key step is heteroarene directed electrophilic aromatic metalation using MnBr(CO)5 as catalyst. This method offers excellent chemical yields and regioselectivity with good functional group tolerance. This base metal catalyzed reaction proceeds efficiently
We first report the direct ortho C–Hamidation of arenes with azides by using a novel and inexpensive RuHCl(CO)(PPh3)3 catalyst. The reaction proceeds efficiently in high yield over a broad range of substrates without requirement of any additional silver salt or additive.
Rhodium‐Catalyzed C−H Activation Enabled by an Indium Metalloligand
作者:Ryosuke Yamada、Nobuharu Iwasawa、Jun Takaya
DOI:10.1002/anie.201910197
日期:2019.11.25
Rhodium complexes with an indiummetalloligand were successfully synthesized by utilizing a pyridine-tethered cyclopentadienyl ligand as a support for an In-Rh bond. The indiummetalloligand dramatically changes the electronic and redox properties of the rhodium metal, thereby enabling catalysis of sp2 C-H bond activation.
Rhodium(III)-Catalyzed Intermolecular N-Chelator-Directed Aromatic C–H Amidation with Amides
作者:Huaiqing Zhao、Yaping Shang、Weiping Su
DOI:10.1021/ol4024776
日期:2013.10.4
Rh(III)-catalyzed intermolecular direct aromatic C–H bond amidation with amides has been accomplished under mild reaction conditions. This protocol is applicable to a broad range of N-chelator-containing arenes amidated with aromatic and aliphatic sulfonamides. A possible mechanism is proposed according to the experimental results.