Wang Q, Xiao F, Huang Z, Mao G, Deng GJ. CuBr
2-Catalyzed Annulation of 2-Bromo-
N-Arylbenzimidamide with Se/S
8 Powder for the Synthesis of Benzo[
d]isoselenazole and Benzo[
d]isothiazole.
J Org Chem 2023;
88:1963-1976. [PMID:
36720013 DOI:
10.1021/acs.joc.2c02088]
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Abstract
A CuBr2-catalyzed annulation of 2-bromo-N-arylbenzimidamide with selenium/sulfur powder for the synthesis of benzo[d]isoselenazole and benzo[d]isothiazole in generally good yields was investigated. This synthetic strategy features good substrate scope and functional group tolerance. Furthermore, the corresponding products could be converted into N-aryl indoles via rhodiumIII-catalyzed ortho C-H activation of the N-phenyl ring, providing an efficient approach for axial aromatic molecules.
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