A convenient oxidative cyclodesulfurization method toward the synthesis of benzofused nitrogen heterocycles using inexpensive and readily available potassium periodate as an oxidant was developed. Upon treating isothiocyanates with ortho-substituted anilines bearing N,N-, N,O-, and N,S-bis-nucleophiles, followed by an intramolecular cyclization of the in situ generated monothioureas, substituted 2-aminobenzazole
An Unexpected Formation of 2‐Arylbenzimidazoles from α,α‐Diiodo‐α’‐acetoxyketones and
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‐Phenylenediamines
作者:Santu Sadhukhan、Swagata Mondal、Beeraiah Baire
DOI:10.1002/ejoc.202101375
日期:2022.2.11
An unusual, stepwise, two-carbon fragmentation-based mechanistic pathway through domino amidation–aziridination–decarbonylation–I2-mediated aminative cyclization–oxidation has been unravelled for the reaction between α,α-diiodo-α’-acetoxyketones and o-phenylenediamine in the absence of any added reagents such as acids, catalysts or bases as oxidants.