Claisen self-condensation/decarboxylation as the key steps in the synthesis of C2-symmetrical 1,7-dioxaspiro[5.5]undecanes
作者:Bas Lastdrager、Mattie S.M. Timmer、Gijsbert A. van der Marel、Herman S. Overkleeft
DOI:10.1016/j.tetlet.2005.07.073
日期:2005.9
A convenient method for the synthesis of functionalised 1,7-dioxaspiro[5.5]undecanes using acid-catalysed spiroketalisations of substituted dihydroxyketones is described. The dihydroxyketones were readily prepared from appropriately substituted hydroxy esters via Claisen self-condensation followed by decarboxylation.
描述了一种方便的方法,用于使用取代的二羟基酮的酸催化螺酮化来合成官能化的1,7-二氧杂螺[5.5]十一烷。经由克莱森自缩合然后脱羧,由适当取代的羟基酯容易地制备二羟基酮。