Development of a Rhodium(II)-Catalyzed Chemoselective C(sp<sup>3</sup>)H Oxygenation
作者:Yun Lin、Lei Zhu、Yu Lan、Yu Rao
DOI:10.1002/chem.201502140
日期:2015.10.12
We report the first example of RhII‐catalyzed chemoselective double C(sp3)Hoxygenation, which can directly transform various toluene derivatives into highly valuable aromatic aldehydes with great chemoselectivity and practicality. The critical combination of catalyst Rh(OAc)2, oxidant Selectfluor, and solvents of TFA/TFAA promises the successful delivery of the oxidation with satisfactory yields
Palladium Catalyzed Carbonylative Coupling for Synthesis of Arylketones and Arylesters Using Chloroform as the Carbon Monoxide Source
作者:Poonam Sharma、Sandeep Rohilla、Nidhi Jain
DOI:10.1021/acs.joc.6b02711
日期:2017.1.20
describe a modular, palladium catalyzed synthesis of aryl(hetero)aryl benzophenones and aryl benzoates from aryl(hetero)aryl halides using CHCl3 as the carbonyl source in the presence of KOH. The reaction occurs in tandem through an initial carbonylation to generate an aroyl halide, which undergoes coupling with arylboronic acids, bornonates, and phenols. Direct carbonylative coupling of indoles at the
Synthesis of Substituted Naphthalenes by 1,4-Palladium Migration Involved Annulation with Internal Alkynes
作者:Dong Wei、Tian-Jiao Hu、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1002/cjoc.201800169
日期:2018.8
The palladium catalyzed annulation of 1‐bromo‐2‐vinylbenzene derivatives with internal alkynes was realized for the efficient synthesis of substitutednaphthalenes. A controllable aryl to vinylic 1,4‐palladium migration process is the key for success.
Erbium trifluoromethanesulfonate catalyzed Friedel–Crafts acylation using aromatic carboxylic acids as acylating agents under monomode-microwave irradiation
作者:Phuong Hoang Tran、Poul Erik Hansen、Hai Truong Nguyen、Thach Ngoc Le
DOI:10.1016/j.tetlet.2014.12.038
日期:2015.1
Erbium trifluoromethanesulfonate is found to be a good catalyst for the Friedel–Craftsacylation of arenes containing electron-donating substituents using aromatic carboxylicacids as the acylating agents under microwave irradiation. An effective, rapid and waste-free method allows the preparation of a wide range of aryl ketones in good yields and in short reaction times with minimum amounts of waste
Borylation of Olefin C–H Bond via Aryl to Vinyl Palladium 1,4-Migration
作者:Tian-Jiao Hu、Ge Zhang、Ya-Heng Chen、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1021/jacs.5b11990
日期:2016.3.9
The aryl to vinyl palladium 1,4-migration was realized for the first time. The generated alkenyl palladium species was trapped by diboron reagents under Miyaura borylation conditions, providing a new method to synthesize β,β-disubstituted vinylboronates. The excellent regioselectivity and broad substrate scope were observed for this novel transformation.