Microwave-assisted [3 + 2] cycloaddition reactions of dicyanoepoxides with benzylidene Meldrum's acids†
Abstract
The [3 + 2] cycloaddition of dicyanoepoxides with benzylidene Meldrum's acid under microwave irradiation and solvent-free conditions was explored for the synthesis of trioxaspirodecanes. This method presents a highly diastereo- and regioselective route to spiro cycloadducts, delivering similar stereoselectivity to conventional reflux in toluene but with shorter reaction times and improved yields.