Gold(<scp>i</scp>)-catalyzed nucleophilic cyclization of β-monosubstituted <i>o</i>-(alkynyl)styrenes: a combined experimental and computational study
作者:Cintia Virumbrales、Marta Solas、Samuel Suárez-Pantiga、Manuel A. Fernández-Rodríguez、Marta Marín-Luna、Carlos Silva López、Roberto Sanz
DOI:10.1039/c9ob02126d
日期:——
The stereospecific gold(I)-catalyzed nucleophilic cyclization of β-monosubstituted o-(alkynyl)styrenes to produce C-1 functionalized 1H-indenes including challenging substrates and nucleophiles, such as β-(cyclo)alkyl-substituted o-(alkynyl)styrenes and a variety of alcohols as well as selected electron-rich aromatics, is reported. DFT calculations support the stereochemical outcome of the process
Gold Catalysis: Synthesis of 3-Acylindenes from 2-Alkynylaryl Epoxides
作者:A. Stephen K. Hashmi、Miriam Bührle、Ralph Salathé、Jan W. Bats
DOI:10.1002/adsc.200800385
日期:2008.9.5
A series of 2-alkynylarylepoxides were prepared by a sequence of Sonogashira coupling, Wittig olefination and epoxidation or a Darzens’ glycid ester synthesis. The conversion of these substrates with gold(I) catalysts furnished 3-acylindenes and, in occasional cases as side-products, the products of an isomerization of the oxirane ring to a ketone. Isotope labelling of the epoxide oxygen indicates