Photoactivation of Amino-Substituted 1,4-Benzoquinones for Release of Carboxylate and Phenolate Leaving Groups Using Visible Light Yugang Chen and Mark G. Steinmetz* Department of Chemistry, Marquette UniVersity, Milwaukee, Wisconsin 53201-1881
[email protected] ReceiVed April 13, 2006
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 CH3CN, and
