Tetrahedron Letters

Synthesis of substituted 6H-benzo [c] chromenes: A palladium promoted ring closure of diazonium tetrafluoroborates

J Zhou, LZ Huang, YQ Li, ZT Du

文献索引：Zhou, Jing; Huang, Liang-Zhu; Li, You-Qiang; Du, Zhen-Ting Tetrahedron Letters, 2012 , vol. 53, # 52 p. 7036 - 7039

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被引用次数: 8

摘要

A highly efficient palladium-catalysed phenyl diazonium tetrafluoroborate participation of C– H activation ring closure protocol has been developed. A series of 6H-benzo [c] chromenes have been synthesized by intramolecular cyclization of ortho diazonium salts tetrafluoroborate of benzyloxyphenyl (Method A), or phenoxymethyl phenyl (Method B). The transformation allows the synthesis of 6H-benzo [c] chromenes with a wide variety of ...