Synthesis of 2-Alkenyl- and 2-Alkynyl-benzo[b]phospholes by Using Palladium-Catalyzed Cross-Coupling Reactions

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• 作者：Yoshihiro Matano ; Yukiko Hayashi ; Kayo Suda ; Yoshifumi Kimura ; Hiroshi Imahori
• 刊名：Organic Letters
• 出版年：2013
• 出版时间：September 6, 2013
• 年：2013
• 卷：15
• 期：17
• 页码：4458-4461
• 全文大小：269K
• 年卷期：v.15,no.17(September 6, 2013)
• ISSN：1523-7052

文摘

Heck, Stille, and Sonogashira reactions of 2-bromobenzo[b]phosphole P-oxide afforded a series of 2-alkenyl- and 2-alkynyl-benzo[b]phosphole P-oxides. The charge-transfer character of the new benzo[b]phosphole 蟺-systems in the excited state is enhanced by the terminal electron-donating substituents. Furthermore, the C鈥揝n cross-coupling of the bromide was applied to the facile synthesis of a new Stille-coupling precursor, 2-stannylbenzo[b]phosphole.