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- W4250192544 abstract "The direct N-arylation of cyclic amides can be considered a pivotal issue for modern organic chemistry. Here, we report the method for copper-catalyzed <i>N</i>-arylation of diverse oxadiazolones by diaryliodonium salts in mild conditions in high yields (up to 92%) using available CuI as a catalyst. The developed method allows to efficiently utilize both symmetric and unsymmetric diaryliodonium salts bearing auxiliary groups such as 2,4,6-trimethoxyphenyl (TMP). The evaluation of steric effects in aryl moieties to the chemoselectivity of <i>N</i>- and <i>O</i>-arylation of the 1,2,4-oxadiazol-5(4<i>H</i>)-ones exhibited the high potential of mesityl-substituted diaryliodonium salts as a selective arylation reagent. The structural study suggests that steric accessibility of <i>N</i>-atom in 1,2,4-oxadiazol-5(4<i>H</i>)-ones impact to arylation with sterically hindered diaryliodonium salts. The synthetic application of proposed method was also demonstrated on selective arylation of 1,3,4-oxadiazol-2(3<i>H</i>)-ones and 1,2,4-oxadiazole-5-thiol." @default.
- W4250192544 created "2022-05-12" @default.
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- W4250192544 date "2021-04-05" @default.
- W4250192544 modified "2023-09-28" @default.
- W4250192544 title "Copper-Catalyzed Selective Arylation of Oxadiazolones by Diaryliodonium Salts" @default.
- W4250192544 doi "https://doi.org/10.26434/chemrxiv.14368985" @default.
- W4250192544 hasPublicationYear "2021" @default.
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