Formation of benzofurans in a stoichiometric annulation reaction between stable Pallada (II) Cycles hypervalent vinyl- and alkynyl(phenyl)iodonium salts
作者:Piyali Datta Chaudhuri、Ruiyun Guo、Helena C. Malinakova
DOI:10.1016/j.jorganchem.2007.11.034
日期:2008.2
Stable pallada(II)cycles featuring Csp2–Pd and Csp3–Pd bonds reacted with vinyl- and alkynyl(phenyl)iodonium salts to generate two new geminal carbon–carbon bonds to the terminal carbon of the vinyl and alkynyl substituents providing benzofuran and dihydrobenzofuran heterocycles. The new annulation process was rationalized by the involvement of Pd(IV) intermediates arising via an initial oxidative