Synthesis of the acyltetronic acid ionophore tetronasin (ICI M139603)
作者:Steven V. Ley、Dearg S. Brown、J. Andrew Clase、Antony J. Fairbanks、Ian C. Lennon、Helen M. I. Osborn、Elaine S. E. StokeséOwen、David J. Wadsworth
DOI:10.1039/a804170i
日期:——
preparation of tetronasin 1, an acyltetronicacid ionophore demonstrating antibiotic, antiparasitic and growth promotion in ruminants is described. The key step involves a metal mediated cyclization reaction which creates two rings and four new stereocentres in a highly efficient manner. The configurations of three of these stereocentres are as required for the synthesis of tetronasin. The remaining stereocentre