R. Zimmer et al., SYNTHETIC MODIFICATIONS OF ASCOMYCIN .2. A SIMPLE AND EFFICIENT WAY TO MODIFIED ISO-ASCOMYCIN DERIVATIVES, Tetrahedron letters, 36(42), 1995, pp. 7635-7638
A simple and convenient semisynthetic preparation of C-26 substituted
iso-ascomycin derivatives, starting from the readily available 33-O-si
lylated 22(S)-dihydro-iso-ascomycin 1 is described.