Synthesis of allenic diols by samarium diiodide-promoted coupling between alkynyloxiranes and ketones
作者:JoséM. Aurrecoechea、Eva Alonso、Mónica Solay
DOI:10.1016/s0040-4020(98)00110-0
日期:1998.4
The SmI2-mediated reductive coupling between alkynyloxiranes and ketones provides a new route to 2,3-pentadiene-1,5-diols. The preferred stereochemistry observed in the coupling products is the result of the new CC bond forming anti with respect to the opening epoxide ring. Yields and diastereoselectivities are dependent on the alkynyloxirane substitution pattern.
SmI 2介导的炔基肟基和酮之间的还原偶联为2,3-戊二烯-1,5-二醇的合成提供了一条新途径。在偶合产物中观察到的优选的立体化学是新CC键形成的结果反相对于所述开口环氧化物环。产率和非对映选择性取决于炔基环氧乙烷取代模式。