Efficient solid state photocyclization of sterically congested α-o-tolyl ketones despite “poor” geometries for hydrogen abstraction
作者:Peter J. Wagner、Boli Zhou
DOI:10.1016/s0040-4039(01)80575-x
日期:1989.1
Several α-mesityl and α-(o-tolyl)acetophenones undergo photocyclization to 2-indanols almost quantitatively when irradiated as crystals, even those that undergo significant competing α-cleavage or 1,3-aryl shift in solution. The requisite triplet δ-hydrogen abstraction apparently can occur at what appears to be a “bad” geometry. One ketone, α-(o-tolyl)propiophenone, partially rearranges to the β-isomer