Total Synthesis of the Anti Methicillin-Resistant Staphylococcus aureus Peptide Antibiotics TAN-1057A-D
摘要:
TAN-1057A-D, dipeptides isolated from bacteria Flexibacter sp. PK-74 and PK-176, are new antibiotics with potent antibacterial activity against methicillin-resistant Staphylococcus aureus. We describe, in detail, the total synthesis of TAN-l057A-D by a convergent route featuring a new method to construct the cyclic amidinourea functional group.
The chemical structure of a new dipeptide antibiotic, TAN-1057 A, isolated from the broth filtrate of Flexibacter sp. PK-74 was determined to be (3'S, 5S)-5-[N-methyl-N-(3'-amino-6'-guanidinohexanoyl)amino]-5,6-dihydro-2-ureido-4(1H)-pyrimidone. The antibiotic was specifically active against staphylococcus species including methicillin-resistant strains.