Switchable chemoselective aryne reactions between nucleophiles and pericyclic reaction partners using either 3-methoxybenzyne or 3-silylbenzyne

Hongcheng Tan, Shuxin Yu, Xiaoling Yuan, Liyuan Chen, Chunhui Shan, Jiarong Shi and Yang Li ()
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Hongcheng Tan: Chongqing University
Shuxin Yu: Chongqing University
Xiaoling Yuan: Chongqing University
Liyuan Chen: Chongqing University
Chunhui Shan: Chongqing Normal University
Jiarong Shi: Chongqing University
Yang Li: Chongqing University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Arynes are known to serve as highly reactive benzene-based synthons, which have gained numerous successes in preparing functionalized arenes. Due to the superb electrophilic nature of these fleeting species, however, it is challenging to modulate the designated aryne transformation chemoselectively, when substrates possess multiple competing reaction sites. Here, we showcase our effort to manipulate chemoselective control between two major types of aryne transformations using either 3-methoxybenzyne or 3-silylbenzyne, where nucleophilic addition-triggered reactions and non-polar pericyclic reactions could be differentiated. This orthogonal chemoselective protocol is found to be applicable between various nucleophiles, i.e., imidazole, N-tosylated/N-alkyl aniline, phenol, and alcohol, and an array of pericyclic reaction partners, i.e., furan, cyclopentadiene, pyrrole, cycloheptatrienone, and cyclohexene. Beyond arylation reactions, C–N bond insertion, Truce–Smiles rearrangement, and nucleophilic annulation are appropriate reaction modes as well. Moreover, this chemoselective protocol can find potential synthetic application.

Date: 2024
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DOI: 10.1038/s41467-024-47952-8

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