Total Synthesis of Mycalamide A and 7-<i>e</i><i>pi</i>-Mycalamide A
作者:William R. Roush、Lance A. Pfeifer
DOI:10.1021/ol005629l
日期:2000.3.1
[formula: see text] The final stages of a totalsynthesis of mycalamide A are described. A key step is the aldol reaction (mismatched) of imide 4 and aldehyde 5 which provided a ca. 5:4 mixture of aldols 10a and 10b, with incorrect C(7) stereochemistry. Elaboration of the 10a-10b mixture to mycalamide A required epimerization of C(7) at the stage of beta-keto imide 11. Alternatively, Swern oxidation