1,1-Carboboration of alkynylgermanes – New germoles
摘要:
The C C bonds of various alkynylgermanes [Cl(H)Ge(C=C-R-1)(2), Cl2Ge(C=C-R-1)(2) with R-1 = Bu-n, SiMe3, and Ge(C C-R-1)(4) with R-1 - SiMe3] undergo 1,1-carboboration when treated with an excess of triethylborane at 80-110 degrees C. All pure final products with R-1 = 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. (C) 2018 Elsevier B.V. All rights reserved.