Mechanism of the Intramolecular Hexadehydro-Diels–Alder Reaction
作者:Daniel J. Marell、Lawrence R. Furan、Brian P. Woods、Xiangyun Lei、Andrew J. Bendelsmith、Christopher J. Cramer、Thomas R. Hoye、Keith T. Kuwata
DOI:10.1021/acs.joc.5b01356
日期:2015.12.4
Theoretical analysis of the mechanism of the intramolecular hexadehydro-Diels–Alder (HDDA) reaction, validated against prior and newly measured kinetic data for a number of different tethered yne-diynes, indicates that the reaction proceeds in a highly asynchronous fashion. The rate-determining step is bond formation at the alkyne termini nearest the tether, which involves a transition-state structure
作者:Thomas R. Hoye、Beeraiah Baire、Dawen Niu、Patrick H. Willoughby、Brian P. Woods
DOI:10.1038/nature11518
日期:2012.10.11
produce the highly reactivebenzyneintermediate. The reaction conditions for this simple, thermal transformation are notable for being free of metals and reagents. The subsequent and highly efficient trapping reactions increase the power of the overall process. Finally, we provide examples of how this de novo benzyne generation approach allows new modes of intrinsic reactivity to be revealed.
Hydroarylation of Arynes Catalyzed by Silver for Biaryl Synthesis
作者:Nam-Kyu Lee、Sang Young Yun、Phani Mamidipalli、Ryan M. Salzman、Daesung Lee、Tao Zhou、Yuanzhi Xia
DOI:10.1021/ja500292x
日期:2014.3.19
A new biaryl synthesis via silver-catalyzed hydroarylation of arynes from acyclic building blocks with unactivated arenes in intra- and intermolecular manners has been developed. The previously observed Diels-Alder reactions of arynes with arene were not observed under the current silver-catalyzed conditions. Deuterium scrambling and DFT calculations suggest a stepwise electrophilic aromatic substitution