Regio- and stereoselective selenium dioxide allylic oxidation of (E)-dialkyl alkylidenesuccinates to (Z)-allylic alcohols: Synthesis of natural and unnatural butenolides
作者:Ramesh M. Patel、Vedavati G. Puranik、Narshinha P. Argade
DOI:10.1039/c1ob05709j
日期:——
allylic alcohol formation of dialkyl alkylidenesuccinates has been demonstrated to accomplish one-step syntheses of several essential butenolides and fused butenolidesvia an unusual E- to Z- carbon–carbon double bond isomerisation followed by the lactonization pathway. The observed regio- and stereoselective SeO2 allylic oxidation protocol has also been extended to the diastereoselective total synthesis
首次证明SeO 2诱导的二烷基亚烷基琥珀酸二烷基酯的(Z)选择性烯丙醇的形成通过不寻常的E-到Z-碳-碳双键异构化然后进行内酯化来完成几种基本丁烯内酯和稠合丁烯内酯的一步合成。途径。观察到的区域和立体选择性SeO 2烯丙基氧化方案也已扩展到生物活性天然产物异内酯的非对映选择性全合成,其直接转化为薄荷酸内酯和γ-内酯分子内重排为δ-内酯的例子。