Hydroxy-directed ketone reduction. Application to the synthesis of (+)-8,8a-diepicastanospermine
作者:Stephen H. J. Thompson、R. Sankara Subramanian、John K. Roberts、Michael S. Hadley、Timothy Gallagher
DOI:10.1039/c39940000933
日期:——
Reduction of heterocyclic-derived aldol adducts 2 and 3 using NaBH(OAc)3 is stereoselective and proceeds via a hydroxy-directed mechanism to give 6 and 7, respectively, thereby complementing the stereoselectivity available with NaBH4; a synthesis of (+)-8,8a-diepicastanospermine 11 from diol 6 is described.
使用 NaBH(OAc)3 还原杂环衍生的醛醇加合物 2 和 3 具有立体选择性,并通过羟基定向机制分别得到 6 和 7,从而补充了 NaBH4 的立体选择性。