Abstract:
:Conjugation of pleuromutilin is an attractive strategy for the development of novel antibiotics and the fight against multiresistant bacteria as the class is associated with low rates of resistance and cross-resistance development. Herein, the preparation of 35 novel (+)-pleuromutilin conjugates is reported. Their design was based on a synthetically more efficient benzyl adaption of a potent lead but still relied on the Cu(I)-catalyzed alkyne-azide [3 + 2] cycloaddition for conjugation onto pleuromutilin. Their antibacterial activity was evaluated against the multiresistant Staphylococcus aureus strain USA300 for which they displayed moderate to excellent activity. Compound 35, bearing a para-benzyladenine substituent, proved particularly potent against USA300 and additional strains of MRSA and displayed as importantly no cytotoxicity in four mammalian cell lines. Structure-activity relationship analysis revealed that the purine 6-amino is essential for high potency, likely because of strong hydrogen bonding with the RNA backbone of C2469, as suggested by a molecular model based on the MM-GBSA approach.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Heidtmann CV,Voukia F,Hansen LN,Sørensen SH,Urlund B,Nielsen S,Pedersen M,Kelawi N,Andersen BN,Pedersen M,Reinholdt P,Kongsted J,Nielsen CU,Klitgaard JK,Nielsen Pdoi
10.1021/acs.jmedchem.0c01328subject
Has Abstractpub_date
2020-12-24 00:00:00pages
15693-15708issue
24eissn
0022-2623issn
1520-4804journal_volume
63pub_type
杂志文章abstract::Analogues of nicotinic acid adenine dinucleotide phosphate (NAADP) with substitution at either the 4- or the 5-position position of the nicotinic acid moiety have been synthesized from NADP enzymatically using Aplysia californica ADP-ribosyl cyclase or mammalian NAD glycohydrolase. Substitution at the 4-position of th...
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journal_title:Journal of medicinal chemistry
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