63457-11-4Relevant academic research and scientific papers
Derivatives of Ribosome-Inhibiting Antibiotic Chloramphenicol Inhibit the Biosynthesis of Bacterial Cell Wall
Louzoun Zada, Sivan,Green, Keith D.,Shrestha, Sanjib K.,Herzog, Ido M.,Garneau-Tsodikova, Sylvie,Fridman, Micha
, p. 1121 - 1129 (2018/07/25)
Here, we describe the preparation and evaluation of α,β-unsaturated carbonyl derivatives of the bacterial translation inhibiting antibiotic chloramphenicol (CAM). Compared to the parent antibiotic, two compounds containing α,β-unsaturated ketones (1 and 4) displayed a broader spectrum of activity against a panel of Gram-positive pathogens with a minimum inhibitory concentration range of 2-32 μg/mL. Interestingly, unlike the parent CAM, these compounds do not inhibit bacterial translation. Microscopic evidence and metabolic labeling of a cell wall peptidoglycan suggested that compounds 1 and 4 caused extensive damage to the envelope of Staphylococcus aureus cells by inhibition of the early stage of cell wall peptidoglycan biosynthesis. Unlike the effect of membrane-disrupting antimicrobial cationic amphiphiles, these compounds did not rapidly permeabilize the bacterial membrane. Like the parent antibiotic CAM, compounds 1 and 4 had a bacteriostatic effect on S. aureus. Both compounds 1 and 4 were cytotoxic to immortalized nucleated mammalian cells; however, neither caused measurable membrane damage to mammalian red blood cells. These data suggest that the reported CAM-derived antimicrobial agents offer a new molecular scaffold for development of novel bacterial cell wall biosynthesis inhibiting antibiotics.
2-amino-1-phenyl-propan-1,3-diol as chiral auxiliary. Application in the synthesis of cis 3-phthalimido-4-styryl-2-azetidinones
Gunda, Tamas E.,Sztaricskai, Ferenc
, p. 7985 - 7998 (2007/10/03)
3,4-cis3,4-cis-1-N-(1'-phenyl-1',3'-dihydroxy-2'-propyl)-3-phthalimido-4 -styrylazetidinones were obtained in optically pure form by chiral Staudinger reaction. The cis-α/β-ratio could be influenced by the protective groups of the diol moiety. Removal of the chiral auxiliarity could be accomplished by direct oxidation, or by previous double bond formation, thus the 2-amino-1-phenyl-propan-1,3-diol can be regarded to a generally useful chiral auxiliary.
