Toward a total synthesis of an aglycone of spiramycine; two complementary accesses to a C-5/C-9 fragment

Article abstract of DOI:10.1016/S0040-4039(97)00945-3

Both homochiral acetates 4d and 5f, which were obtained by lipase-catalysed acetylation of either the tetraol 4a or the diol 5e, respectively, have been converted stereoconvergently into a C-5/C-9 fragment of the title antibiotic.