Visible-light-mediated iodine-catalyzed α-hydroxylation of α-methylene ketones under aerobic conditions†
Visible light, in combination with the molecular iodine catalyst-mediated α-hydroxylation of α-methylene ketones, has been developed. The reaction proceeds smoothly in methanol at room temperature under aerobic conditions and shows exclusive selectivity toward methylene ketones. Mechanistic studies have revealed that the reaction proceeds by a radical pathway. Renewable energy, metal-free catalyst and abundant oxygen source alongside a wide scope and novel selectivity are features that make this strategy practical and eco-friendly.