waxy or even insoluble stilbazoles. Moreover, the oxalicacid loading could be lowered to sub-stoichiometric amounts. When further optimizations were needed, our strategy was found to be highly flexible to identify other oligocarboxylic acids as alternative additive to improve or even overturn regioselectivity. Oxalicacid and other oligocarboxylic acids were found to be capable of orienting more than
moiety are afforded in up to 97% yield and 99:1 enantiomeric ratio. The highly versatile C–B(pin) bond can be converted to a range of useful functional groups, delivering a variety of enantiomerically enriched buildingblocks that are otherwise difficult to access. The utility of this method is further demonstrated by application to a fragment synthesis of biologically active molecule U-75302. Preliminary