1,1-Carboboration of alkynylgermanes – New germoles

Publication date: Available online 23 February 2018 Source:Journal of Organometallic Chemistry Author(s): Bernd Wrackmeyer, Stefan Bayer, Wolfgang Milius, Elena V. Klimkina The C≡C bonds of various alkynylgermanes [Cl(H)Ge(C≡C–R1)2, Cl2Ge(C≡C–R1)2 with R1 = nBu, SiMe3, and Ge(C≡C–R1)4 with R1 = SiMe3] undergo 1,1-carboboration when treated with an excess of triethylborane at 80–110 °C. All pure final products with R1 = SiMe3 possess germole-derived structures. Intermediates and side products as a result of lost stereoselectivity of the 1,1-carboborations could be detected and in some cases identified by NMR spectroscopic studies of the reaction solutions. Graphical abstract

Source: Journal of Organometallic Chemistry - February 23, 2018 Category: Chemistry Source Type: research