Organoborierung von Alkinylstannanen, III1 Zur Reaktion von Trialkylboranen mit Monoalkinylstannanen / Organoboration of Alkynylstannanes, III The Reaction of Trialkylboranes with Monoalkynylstannanes

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Abstract
Organoboration, Alkynylstannanes, cis-Diborylalkenes, NMR Trialkylboranes and 2-phenylborolane are reported to add to monoalkynylstannanes under mild reaction conditions. The structures of the organoboration products are discussed by means of 1H, 11B, 13C and 119Sn NMR spectroscopy. The reaction of the products with boronhalides yields cis-diborylalkenes.