Notable temperature effect on the stereoselectivity in the photochemical [2+2] cycloaddition reaction (Paternò–Büchi reaction) of 2,3-dihydrofuran-3-ol derivatives with benzophenone
A notable temperature effect (nonlinear Eyring plot) on stereoselectivity, trans-configured oxetane 2 versus cis-configured oxetane 2, is reported in the photochemical [2+2] cycloaddition reaction (Paternò–Büchireaction) of 2,3-dihydrofuran-3-ol derivatives 1 with benzophenone.