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Organo-boron compounds S 0040Zr-Mediated Hydroboration: Stereoselective Synthesis of Vinyl Boronic Esters.-A robust and mild protocol is developed for the hydroboration of alkynes with tetramethyldioxaborolane. The process gives (E)-vinylboronic esters (III) in good to excellent selectivity. -(WANG*, Y. D.; KIMBALL, G.; PRASHAD, A. S.; WANG, Y.; Tetrahedron Lett. 46 (2005) 50, 8777-8780; Chem. Screening Sci., Wyeth Res., Pearl River, NY 10965, USA; Eng.) -Mais 13-178

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