Rao MLN, Islam SS. Copper-catalyzed synthesis of 1-(2-benzofuryl)-N-heteroarenes from
o-hydroxy-
gem-(dibromovinyl)benzenes and N-heteroarenes.
Org Biomol Chem 2021;
19:9076-9080. [PMID:
34622915 DOI:
10.1039/d1ob01765a]
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Abstract
An efficient method for the synthesis of 1-(2-benzofuryl)-N-heteroarenes is developed from o-hydroxy-gem-(dibromovinyl)benzenes and N-heteroarenes under copper-catalyzed tandem reaction conditions. This methodology displayed a broad substrate scope and high yields in the preparation of a variety of 1-(2-benzofuryl)-N-heteroarenes. Further, 1-(2-benzofuryl)-N-heteroarenes were also applied in the synthesis of polycyclic benzofuro-indolo-pyridine scaffolds under palladium-catalyzed dehydrogenative coupling conditions. Overall, the present tandem approach is general, synthetically advantageous and avoids air-sensitive reagents.
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