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