Formation of cycloheptatrienes by alkyllithium induced cyclisation of polyunsaturated enol ethers
作者:Anne Kristin Holmeide、Lars Skattebøl
DOI:10.1016/j.tetlet.2006.12.116
日期:2007.2
Two polyunsaturated enolethers have been shown to react with t-butyllithium in THF with formation of cycloheptatriene derivatives as the major volatile products. This novel reaction is explained as a 7-endo-trig cyclisation of the allylic lithium derivative formed by deprotonation at C-5.