Stereoselective samarium diiodide-promoted intermolecular coupling of alkynyloxiranes with ketones. synthesis of 2,3-pentadiene-1,5-diols
作者:JoséM. Aurrecoechea、Mónica Solay
DOI:10.1016/0040-4039(95)00254-a
日期:1995.4
In the presence of samarium diiodide (SmI2), alkynyloxiranes undergo an efficient reductive coupling with ketones to afford 2,3-pentadiene-1,5-diols. The isolated yields are high and the stereoselectivity of the process ranges from moderate to very high. The stereochemistry of the major product of the reaction is the result of the new CC bond forming anti with respect to the opening epoxide ring.
在二碘化sa(SmI 2)的存在下,炔基氧杂环丁烷与酮进行有效的还原偶联,得到2,3-戊二烯-1,5-二醇。分离的收率很高,并且该方法的立体选择性从中等到非常高。反应主要产物的立体化学是新的CC键相对于开环的环形成抗的结果。