(9S)-9-dihydroerythromycin A 9,11-cyclic carbonate 在
盐酸 作用下,
以68%的产率得到(1R,2R,3R,6R,7S,8S,9R,10R,12R,13S,17S)-9-((2S,3R,4S,6R)-4-Dimethylamino-3-hydroxy-6-methyl-tetrahydro-pyran-2-yloxy)-3-ethyl-2,7,10-trihydroxy-2,6,8,10,12,17-hexamethyl-4,14,16-trioxa-bicyclo[11.3.1]heptadecane-5,15-dione