Synthetic studies on the immunosuppressive agent FK-506: Enantioselective synthesis of a C22C34 fragment
作者:Robert K. Baker、Kathleen M. Rupprecht、David M. Armistead、Joshua Boger、Robert A. Frankshun、Paul J. Hodges、Karst Hoogsteen、Judith M. Pissano、Bruce E. Witzel
DOI:10.1016/s0040-4039(97)10532-9
日期:1998.1
The C28C32 cyclohexyl group of the natural product, FK-506, was prepared enantioselectively from the iodolactone by replacement of iodide with retention of configuration. The C27C28 trisubstituted olefin was introduced stereoselectively via a classical aldol/elimination sequence employing titanium enolate methodology. Elaboration of this chemistry has led to a synthesis of a C22C34 fragment of the
天然产物FK-506的C28C32环己基是由碘内酯对映选择性制备的,方法是在保留构型的情况下替换碘化物。使用烯醇钛方法通过经典的羟醛/消除序列立体选择性地引入C27 = C28三取代的烯烃。对这种化学方法的详细说明导致合成了天然产物的C22C34片段。