Transition-Metal-Free Cross-Coupling of Aryl Halides with Arylstannanes
作者:Qing He、Liwen Wang、Yong Liang、Zunting Zhang、Stanislaw F. Wnuk
DOI:10.1021/acs.joc.6b01648
日期:2016.10.7
Transition-metal-free LiCl-promoted cross-coupling reactions of tetraphenyltin, trichlorophenyl-, dichlorodiphenyl-, and chlorotriphenylstannanes with arylhalides in DMF provided access to biaryls in good to high yields. Up to four phenyl groups were transferred from the organostannanes substrates. The aryls bearing electron-withdrawing groups in either halides or organotin substrates gave coupling
Strongly Directing Substituents in the Radical Arylation of Substituted Benzenes
作者:Josefa Hofmann、Timothy Clark、Markus R. Heinrich
DOI:10.1021/acs.joc.6b01840
日期:2016.10.21
radical arylation reactions has grown rapidly in recent years, poor regioselectivities and the need to use a large excess of the radical-accepting arene have hindered their application to substituted benzenes. We now describe experimental and computational investigations into the substituent effects that lead to regioselective addition based on the recent discovery of anilines as outstanding substrates
One‐Pot Sequential Kumada–Tamao–Corriu Couplings of (Hetero)Aryl Polyhalides in the Presence of Grignard‐Sensitive Functional Groups Using Pd‐PEPPSI‐IPent
<sup>Cl</sup>
作者:Narayan Sinha、Pier Alexandre Champagne、Michael J. Rodriguez、Yu Lu、Michael E. Kopach、David Mitchell、Michael G. Organ
DOI:10.1002/chem.201901150
日期:2019.5.7
We report a general and rapid chemoselective Kumada–Tamao–Corriu (KTC) cross‐coupling of aryl bromides in the presence of chlorides or triflates with functionalized Grignardreagents at 0 °C in 15 min by using Pd‐PEPPSI‐IPentCl (C4). Nucleophiles and electrophiles (or both) can contain Grignard‐sensitive functional groups (‐CN, ‐COOR, etc.). Control experiments together with DFT calculations suggest