Regioreversed Allylation in Lewis Acid-mediated and Photochemical Addition Reactions of Unsymmetric α-Diketones with Allylic Stannanes
In the photochemical reaction of allyl- and benzyltrimethylstannanes with unsymmetric α-diketones (PhCOCOR), the allylic group was introduced to the benzoyl carbon in high or excellent selectivity, whereas the acyl carbon was allylated either exclusively