Preparation of allylboronates by Pd-catalysed borylative cyclisation of dienynesElectronic supplementary information (ESI) available: Experimental procedures, data and computational details. See DOI: 10.1039/c3cc45879b

Reaction of a variety of dienynes with bis(pinacolato)diboron catalysed by Pd bis(trifluoroacetate) affords allylic boronates containing five or six membered carbo- or heterocycles, by concomitant formation of one C-C and one C-B bonds. Resulting allylboronates can be employed for a variety of subsequent transformations. Pd-catalysed borylative cyclization of 1,3-dien-8-ynes affords carbo- and heterocycles containing an allylic boronate, by formation of one C-C and one C-B, both regio- and stereoselectively.