Silver-Catalyzed Selective Multicomponent Coupling Reactions of Arynes with Nitriles and Isonitriles
作者:Sourav Ghorai、Yongjia Lin、Yuanzhi Xia、Donald J. Wink、Daesung Lee
DOI:10.1021/acs.orglett.9b04416
日期:2020.1.17
multicomponent coupling reactions with isonitriles and nitriles are described. Crucial to these reactions is the formation of a silver-aryne complex, which shows differential reactivity toward isonitriles and nitriles to form two different forms of ortho-nitrilium organosilver arene species. Interception of the nitrilium of an aryne-isonitrile adduct with another isonitrile leads to the formation of
Synthesis of Imides, Imidates, Amidines, and Amides by Intercepting the Aryne–Isocyanide Adduct with Weak Nucleophiles
作者:Sourav Ghorai、Daesung Lee
DOI:10.1021/acs.orglett.9b02711
日期:2019.9.20
have been developed. Arynes generated from triynes or tetraynes through the hexadehydro Diels-Alder reaction readily react with isocyanide to generate nitrilium intermediate. Intercepting this nitrilium species with various weak nucleophile including carboxylic acids, alcohols, sulfonamides, or water generated the corresponding imides, imidates, amidines, or amides. The high regioselectivity of these
Silver-Catalyzed Annulation of Arynes with Nitriles for Synthesis of Structurally Diverse Quinazolines
作者:Sourav Ghorai、Yongjia Lin、Yuanzhi Xia、Donald J. Wink、Daesung Lee
DOI:10.1021/acs.orglett.9b04395
日期:2020.1.17
An efficient silver catalyzed annulation reaction of aryne with nitriles to generate quinazolines is described. Arynes generated from triynes or tetraynes through a hexadehydro Diels-Alder reaction readily participated in an [A + 2B] mode of annulation with nitriles in the presence of AgSbF6 catalyst. The mechanism was explored by DFT calculations, which supports the silver-catalyzed formation of nitrilium
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
Benzannulation of Triynes to Generate Functionalized Arenes by Spontaneous Incorporation of Nucleophiles
作者:Rajdip Karmakar、Sang Young Yun、Jiajia Chen、Yuanzhi Xia、Daesung Lee
DOI:10.1002/anie.201412468
日期:2015.5.26
The thermal reaction of ester‐tethered 1,3,8‐triynes provides novel benzannulation products with concomitant incorporation of a nucleophile. Evidence suggests that this reaction proceeds via an allene‐enyne intermediate generated by an Alder‐ene reaction in the first step. Depending on the substituent of the alkyne moiety on the allene‐enyne intermediate, the subsequent transformation can take one