A 2-pyrone cycloaddition route to functionalised aromatic boronic esters
作者:Patrick M. Delaney、Duncan L. Browne、Harry Adams、Andrew Plant、Joseph P.A. Harrity
DOI:10.1016/j.tet.2007.08.118
日期:2008.1
A [4+2] cycloaddition/retro-cycloaddition route to functionalised aromatic boronicesters is outlined. A range of electron deficient dienes (2-pyrones) and dienophiles (alkynylboronates) were found to participate in the reaction. Furthermore, high levels of regiocontrol could be obtained in this process and a consistent mode of alkyne insertion has been uncovered.