Regio- and stereospecific [2+2] photocyclodimerization of a crown-containing butadienyl dyeviacation-induced self-assembly in solution†
Abstract
Self-assembled pseudocyclic structures consisting of two molecules of a crown-containing butadienyl dye and two Mg2+ ions readily undergo regio- and stereospecific [2+2] photocycloaddition in MeCN to produce a single cyclobutane stereoisomer in almost quantitative yield.