furnacalis (Guenée) and inhibition of this enzyme has been considered a promising strategy for the development of eco-friendly pesticides. In this article, based on the structure of the catalytic domains of OfHex1, a series of novel glycosyl triazoles were designed and synthesized via Cu-catalyzed azide-alkyne [3+2] cycloaddition reaction. To investigate the potency and selectivity of these glycosyl triazoles
Antibacterial agents, and 4-thio azetidinone intermediates
申请人:Bristol-Myers Company
公开号:US04272437A1
公开(公告)日:1981-06-09
This invention relates to 2-substituted and 2,6-disubstituted penem compounds of the formula ##STR1## wherein Y is hydrogen, halo or certain organic substituents and X represents certain organic substituents. Also included in the invention are pharmaceutically acceptable salts of the above compounds and derivatives of the above compounds in which the carboxyl group at the 3-position is protected as by an easily removable ester protecting group. The compounds of the present invention are potent antibacterial agents or are of use as intermediates in the preparation of such agents.
Allene Functionalized Azobenzene Linker Enables Rapid and Light-Responsive Peptide Macrocyclization
作者:Mohammad R. Jafari、Jenner Lakusta、Rylan J. Lundgren、Ratmir Derda
DOI:10.1021/acs.bioconjchem.6b00026
日期:2016.3.16
functionalized water-soluble azobenzene reagent (BSBDA) and its application as a new tool for the rapid generation of visible light-responsive macrocyclic peptides and peptide libraries displayed on the surface of bacteriophage. The allenamide functionality promotes cysteine ligation in model peptides and those displayed on phage with rates 2–3 orders of magnitude faster than the established alkyl halide
Application of the Barton photochemical reaction in the synthesis of 1-dethia-3-aza-1-carba-2-oxacephem: a novel agent against resistant pathogenic microorganisms
作者:Gholam Hossein Hakimelahi、Pai-Chi Li、Ali A. Moosavi-Movahedi、Jamshid Chamani、Ghadam Ali Khodarahmi、Tai Wei Ly、Famil Valiyev、Max K. Leong、Shahram Hakimelahi、Kak-Shan Shia、Ito Chao
DOI:10.1039/b304167k
日期:——
Racemic 7-(phenylacetamido)-1-dethia-3-aza-1-carba-2-oxacephem 3 was synthesized and found to possess antibacterial activity against Staphylococcus aureus FDA 209P, Escherichia coli ATCC 39188, Pseudomonas aeruginosa 1101–75 and Klebsiella pneumoniae NCTC 418 as well as the β-lactamase producing organisms E. coli A9675 and P. aeruginosa 18S-H and the methicillin-resistant organism S. aureus 95. Formation of the carbacephem 3 originated from the Barton photochemical reaction in the conversion of 8 to 10. Intramolecular cyclization of syn-oximino β-lactam 10 afforded 7-azido-2-oxa-3-azacephem 11, which was reduced and acylated to 12. Enzymatic removal of the methyl group from 12 gave the target molecule 3.
Silyl Imine Electrophiles in Enantioselective Catalysis: A Rosetta Stone for Peptide Homologation, Enabling Diverse <i>N</i>-Protected Aryl Glycines from Aldehydes in Three Steps
作者:Dawn M. Makley、Jeffrey N. Johnston
DOI:10.1021/ol501297a
日期:2014.6.6
es serve in the Bis(AMidine)-catalyzed addition of bromonitromethane with a high degree of enantioselection. This allows for the production of a range of protected α-bromo nitroalkane donors (including Fmoc) for use in Umpolung Amide Synthesis (UmAS). Hence, peptide homologation with nonnatural aryl glycine amino acids is achieved in three steps from aromaticaldehydes, which are plentiful and inexpensive