Studies on the total synthesis of sanglifehrin A: stereoselective synthesis of the C(29)–C(39) fragment
作者:Luiz C. Dias、Airton G. Salles
DOI:10.1016/j.tetlet.2006.01.105
日期:2006.3
A highly stereoselective synthesis of the C(29)–C(39) fragment of the potent immunosuppressant sanglifehrin A has been accomplished by a sequence involving 16 steps (18% overall yield) from N-propionyloxazolidinone 9. Key steps are a diastereoselective hydroboration, and a diastereoselective epoxidation of an allylic alcohol followed by a 1,5-anti boron-mediated aldol reaction of methyl ketone 4 with
在C(29)-C(39)的有效的免疫抑制剂萨菲菌素A的片段的高度立体选择性合成已经由从包括16步(18%总收率)的序列来完成Ñ -propionyloxazolidinone 9。关键步骤是非对映选择性的硼氢化反应,以及烯丙醇的非对映选择性环氧化,然后是甲基酮4与手性醛5的1,5-抗硼介导的羟醛缩合反应。