Alternative Synthesis of (Z)-1-Aryl-1-(tributylstannyl)-2-(triethylgermyl) ethenes and the Unprecedented Germyl 1, 2-Migration during the Destannylation of the Adducts.
A specific combination catalyst, Pd (dba) 2 and 4-ethyl-1-phospha-2, 6, 7-trioxabicyclo [2.2. 2] octane, effectively catalyzed the addition of tributyl (triethylgermyl) stannane to arylacetylenes in tetrahydrofuran to give (Z)-1-aryl-2-(germyl)-1-(stannyl) ethenes in high yields. The (Z)-1-aryl-2-(germyl)-1-(stannyl) ethenes were subject to the unprecedented germyl 1, 2-migration during the destannylation using HI/TBAI in toluene to produce 1-aryl ...
