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An efficient and user-friendly synthesis of 7H-chromeno[3,2-c]quinolines has been developed via a one-pot oxidative O-arylation, Pd-catalyzed C(sp3)-H arylation of readily available arylols and trivalent aryliodine reagents. A variety of valuable and complex fused heterocycles were quickly assembled in high isolated yields with broad substrate scopes. [ABSTRACT FROM AUTHOR]

A one-pot, two-step cyclization reaction of iodoarenes with diversified arylols, including 4-hydroxyquinoline, quinolinone, 4-hydroxypyridine and phenol, has been developed. By using this palladium-catalyzed formal tandem O-arylation, dehydrogenative cross-coupling reaction, a variety of biologically significant fused benzo[4,5]furo heterocycles and dibenzofurans were quickly assembled in high yields with excellent regioselectivity. Notably, the efficient one-pot reaction led to the heterocycles via sequential oxidation, iodination, isomerization and cyclization steps without purification of any reaction intermediates. [ABSTRACT FROM AUTHOR]

This efficient one-pot reaction leads to a wide range of heterocycles via sequential oxidation, iodination, isomerization, and cyclization steps without purification of any reaction intermediates. [ABSTRACT FROM AUTHOR]