An Efficient Buchwald–Hartwig/Reductive Cyclization for the Scaffold Diversification of Halogenated Phenazines: Potent Antibacterial Targeting, Biofilm Eradication, and Prodrug Exploration
作者:Aaron T. Garrison、Yasmeen Abouelhassan、Dimitris Kallifidas、Hao Tan、Young S. Kim、Shouguang Jin、Hendrik Luesch、Robert W. Huigens
DOI:10.1021/acs.jmedchem.7b01903
日期:2018.5.10
Bacterial biofilms are surface-attached communities comprised of nonreplicating persistercells housed within a protective extracellular matrix. Biofilms display tolerance toward conventional antibiotics, occur in ∼80% of infections, and lead to >500000 deaths annually. We recently identified halogenatedphenazine (HP) analogues which demonstrate biofilm-eradicating activities against priority pathogens;
Cyclopropenone-caged Sondheimer diyne (dibenzo[a,e]cyclooctadiyne): a photoactivatable linchpin for efficient SPAAC crosslinking
作者:Dewey A. Sutton、Seok-Ho Yu、Richard Steet、Vladimir V. Popik
DOI:10.1039/c5cc08106h
日期:——
Photo double “click”: Irradiation of bis-cyclopropenone-masked dibenzocyclooctadiynes with UVA or violet light allows for the efficient derivatization of azide-tagged substrates with azide-bearing functional moieties.
Amide-to-Ester Substitution as a Strategy for Optimizing PROTAC Permeability and Cellular Activity
作者:Victoria G. Klein、Adam G. Bond、Conner Craigon、R. Scott Lokey、Alessio Ciulli
DOI:10.1021/acs.jmedchem.1c01496
日期:2021.12.23
couplings due to their reliability. Amides, however, can give rise to poor absorption, distribution, metabolism, and excretion (ADME) properties. We hypothesized that a bioisosteric amide-to-ester substitution could lead to improvements in both physicochemical properties and bioactivity. Using model compounds, bearing either amides or esters, we identify parameters for optimal lipophilicity and permeability
The invention relates to iRNA agents, which preferably include a monomer in which the ribose moiety has been replaced by a moiety other than ribose. The inclusion of such a monomer can allow for modulation of a property of the iRNA agent into which it is incorporated, e.g., by using the non-ribose moiety as a point to which a ligand or other entity, e.g., a carbohydrate; or a steroid, e.g., cholesterol, which is optionally substituted with at least one carbohydrate. is directly, or indirectly, tethered. The invention also relates to methods of making and using such modified iRNA agents.
The invention relates to iRNA agents, which preferably include a monomer in which the ribose moiety has been replaced by a moiety other than ribose. The inclusion of such a monomer can allow for modulation of a property of the iRNA agent into which it is incorporated, e.g., by using the non-ribose moiety as a point to which a ligand or other entity, e.g., a carbohydrate; or a steroid, e.g., cholesterol, which is optionally substituted with at least one carbohydrate. is directly, or indirectly, tethered. The invention also relates to methods of making and using such modified iRNA agents.