Solvent-Controlled Intramolecular [2 + 2] Photocycloadditions of α-Substituted Enones
作者:Stephanie M. Ng、Scott J. Bader、Marc L. Snapper
DOI:10.1021/ja060968g
日期:2006.6.1
The regio- and stereoselectivity of intramolecular [2 + 2] photocycloadditions of 2‘-hydroxyenones are shown to be solvent-dependent. In the presence of aprotic solvents, 2‘-hydroxyenones undergo photocycloadditions in a manner consistent with the presence of an intramolecular hydrogen bond between the carbonyl group and the tether's hydroxy functionality. In protic solvents, intermolecular interactions