Bj. Costello et al., STEREOSELECTIVE SYNTHESES OF THE 14-HYDROXY EPIMERS OF AMPHOTERICIN-BMETHYL-ESTER, Journal of the Chemical Society. Perkin transactions. I, (16), 1993, pp. 1829-1830
(14R)-Hydroxyamphotericin B methyl ester 8 and its (14S)-epimer 12 hav
e been obtained by way of m-CPBA oxidation of the enol ethers 5 and 6
respectively.