differentially protected F-pyran ring of the altohyrtins is described, which relies on a key intramolecular cyclisation of a C43 hydroxyl group onto a C38–C39 epoxide. The C38–C39 epoxide stereochemistry was achieved through optimisation of substrate control. Key aldol studies towards coupling the F-pyran ring with an E-pyran ring precursor was investigated, but unsuccessful.
记载了高保护蛋白的差异保护的F-
吡喃环的不对称合成过程,该过程依赖于C 43羟基在C 38 –C 39
环氧化物上的关键分子内环化作用。C 38 –C 39环氧立体
化学是通过优化底物控制来实现的。进行了有关将F-
吡喃环与E-
吡喃环前体偶联的关键羟醛研究,但未成功。