Total Synthesis of the Serine/Threonine-Specific Protein Phosphatase Inhibitor Tautomycin<sup>1</sup>
作者:James E. Sheppeck、Wen Liu、A. Richard Chamberlin
DOI:10.1021/jo961633s
日期:1997.1.1
A convergent, asymmetric synthesis of the protein phosphatase inhibitor, tautomycin, is described. The natural product was constructed by joining two major fragments of comparable complexity at the C21-C22 bond. Absolute stereochemistry of the C1-C21 ketone originates from (S)-citronellene and (2R,3S)-geraniol epoxide. The anti stereochemical relationships at C6-C7 and C18-C19 were introduced with
描述了蛋白质磷酸酶抑制剂互变霉素的收敛,不对称合成。天然产物是通过在C21-C22键处连接两个相当复杂的主要片段而构建的。C 1 -C 21酮的绝对立体化学源自(S)-香茅烯和(2R,3S)-香叶醇环氧化物。用Duthaler的手性丙酸钛烯醇酯介绍了C6-C7和C18-C19的抗立体化学关系。使用Evan的恶唑烷酮手性助剂建立了C13-C14和C23-C24的顺式立体化学关系。通过以丙酮N,N-二甲基hydr为中心关键的一锅双烷基化-螺环化序列有效地构建了螺酮。