A simple synthesis of B-2-(1-trimethylgermyl-1-alkyl)-1,3,2-dioxaborinanes. Isolation and selective oxidation to 1-trimethylgermyl-1-alkanols

(Z)-1-Trimethylgermyl-1-alkenes easily prepared by the hydroboration of the corresponding 1-trimethylgermyl-1-alkynes followed by protonolysis with acetic acid, readily react with dichloroborane–dioxane complex in dichloromethane for 6 h. The resulting solution is then treated with 1,3-propane diol in dichloromethane at 0 °C for half an hour to provide the corresponding gem-dimetalloalkanes containing boron and germanium. These α-trimethylgermylalkylboronate esters are purified by vacuum distillation in high yields (72–82%) and the structures of these novel intermediates are further confirmed by selective oxidation with alkaline hydrogen peroxide to provide the corresponding alcohols containing α-trimethylgermyl group in very good yields (74–84%).