Organoborierung von Alkinylstannanen, XIV Organoborierung von Bis(alkinyl)stannanen: Mechanismus und Anwendung der 119Sn–NMR-Spektroskopie/ Organoboration of Alkynylstannanes, XIV Organoboration of Bis(alkynyl)stannanes: Mechanism and Application of 119Sn NMR Spectroscopy
Open Access
- 1 August 1984
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 39 (8) , 1037-1041
- https://doi.org/10.1515/znb-1984-0808
Abstract
Dimethylbis(phenylethynyl)stannane (1) reacts with trialkylboranes, BR3 (2), to give bis(alkenyl stannanes (5) (R = C2H5), 1-bora-4-stanna-2,5-cyclohexadienes (6 ) (R = C2H5, C3H7 i), 1- stanna-2,4-cyclopentadienes (7) (R = C2H5) and l-stanna-3-cyclopentenes (8 ) (R = CH3, C2H5). 13C and 119Sn NMR data prove the structure of the reaction products (5 to 8 ). 119Sn NMR is useful (i) for following the course of the reaction (mechanism!) and (ii) for quantitative analysis of the product distribution. Deorganoboration reactions play an important role in the formation of the various heterocyclic systems.Keywords
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