functionalized 2H-pyran-2-ones has been demonstrated for the synthesis of various multi-substituted benzenes through a tandem process. We observed that lithium hydroxide provides a major product from α-attack and a minor product from γ-attack of allyl cyanide, while the use of sodium hydride as a base exclusively provides the product by γ-attack of allyl cyanide. We have also performed NMR experiments to understand
Acetyltrimethylsilane: A Novel Reagent for the Transformation of 2<i>H</i>-Pyran-2-ones to Unsymmetrical Biaryls
作者:Atul Goel、Deepti Verma、Manish Dixit、Resmi Raghunandan、P. R. Maulik
DOI:10.1021/jo052085y
日期:2006.1.1
An expeditioussynthesis of unsymmetrical biaryls functionalized with electron-withdrawing or -donating substituents is described and illustrated by carbanion-induced ring transformation of 2H-pyran-2-one using acetyltrimethylsilane (ATMS) as a novel reagent in good yield. The novelty of the reaction lies in the creation of an aromatic ring from 2H-pyran-2-ones via two-carbon insertion from ATMS used