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Music, Arif; Baumann, Andreas N.; Spiess, Philipp; Hilgert, Nicolas; Koellen, Martin; Didier, Dorian (2019): Single-Pot Access to Bisorganoborinates: Applications in Zweifel Olefination. In: Organic Letters, Vol. 21, No. 7: pp. 2189-2193
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Zweifel olefination is a catalyst-free reaction that serves alkene functionalization. While most methods employ commercially available boron pinacol esters, we have assembled a sequence in which the two partners of the formal coupling reaction are installed successively, starting from inexpensive boron alkoxides. The in situ formation of bisorganoborinates was accomplished by consecutive reaction of two different organometallic species. This single-pot procedure represents a great advancement in the generation of organoborinates and their involvement in C-C bond formation.