Approaches to the 1,6,8-trioxadispiro[4.1.5.3]pentadec-13-en-15-ol ring system of salinomycin and related polyether antibiotics
Abstract
The acid-catalysed rearrangement of 2,5-dialkyl-2,5-dioxy-2,5-dihydrofurans (9) and (15) are key steps common to two alternative approaches to the dispiroacetal ring system of salinomycin and related polyether antibiotics.