Photoactivation of amino-substituted 1,4-benzoquinones for release of carboxylate and phenolate leaving groups using visible light

Article abstract of DOI:10.1021/jo060790g

Upon exposure to visible light, 2-pyrrolidino-substituted 3,6-dimethyl-1,4-benzoquinones photocyclize to give benzoxazolines with quantum yields of 0.07-0.10 in CH₂Cl₂, 0.02-0.04 in CH ₃CN, and <0.01 in 30% aq CH₃