Chimeric azalides with simplified western portions
摘要:
A series of chimeric azalides which are homologous to the azalide antibiotics 2 and 4 in their eastern halves but which have functionally simplified western halves have been semisynthesized from erythromycin A. These chimeric azalides include both macrolactones and macrolactams and vary in ring size from 13 to 16 members. The synthesis, which establishes the ring via a macrolactonization or macrolactamization reaction, requires no protecting groups on the eastern half of the molecule, including the sugars.