作者:Marit Rolandsgard、Saad Baldawi、Doina Sirbu、Vidar Bjørnstad、Christian Rømming、Kjell Undheim
DOI:10.1016/j.tet.2005.02.021
日期:2005.4
Preparation of α-oxo derivatives of spiro[4.4]nonane, spiro[4.5]decane and spiro[5.5]undecane derivatives is described. An efficient method for spiroannulation by Rh(I)-catalysed intramolecular hydroacylation provides α,α′-difunctionalised spiro[4.5]decanes. The α,α′-dioxo groups have been converted into vinyl triflates for arylation by Pd-catalysed cross-coupling reactions under Stille, Negishi or
描述了螺[4.4]壬烷,螺[4.5]癸烷和螺[5.5]十一烷衍生物的α-氧代衍生物的制备。通过Rh(I)催化的分子内加氢酰化进行螺环化的有效方法可提供α,α'-双官能化的螺环[4.5]癸。在Stille,Negishi或Suzuki条件下,取决于相对反应性,通过Pd催化的交叉偶联反应,已将α,α'-二氧代基转变为乙烯基三氟甲磺酸酯进行芳构化。通过在Pd-碳上催化氢化,对共轭芳基烯烃键进行立体选择饱和,为立体选择制备α-芳基和α,α'-顺式,顺式-二芳基螺环烷(后者具有三明治结构)提供了方法学。在结构分配中已经使用了单晶X射线分析。