Synthesis of some [4.1.1]- and [3.1.1]propellanes with silicon, phosphorus, sulfur, titanium, germanium, or tin in the long bridge
作者:Theodora Butkowskyj-Walkiw、Günter Szeimies
DOI:10.1016/s0040-4020(01)87604-3
日期:1986.1
The doubly lithiated silanes 8b and 13b were cyclized by several dihalides XCl2 affording the [4.1.1]propellanes 9a-g and, respectively, the [3.1.1]propellanes 14a-d. On irradiation of the titanacyclc 9f, “titanocene” was eliminated forming the [3.1.1]propellane 11. Silane 15a was brominated in pyridine to give the dibromide 15b, which served as starting material for the synthesis of propellanes 14e