摘要:
The invention provides N,N'-disubstituted monothiourea or bisthiourea-Pd(0) complexes that are useful as catalysts for palladium-catalyzed Heck reaction of aryl iodides and bromides with olefins, and as catalysts for palladium catalyzed Suzuki reactions of organoboric compounds and aryl halides (Formula A).
摘要:
Provided are synthetic small molecules and their use as drug, in particular in the treatment of cancer. Also provided is a method of inhibiting cancer stem cells. Also provided is a method for treatment of cancers and other diseases by affecting mitochondrial functions. Also provided is a method of making and using of the compounds.
摘要:
Disclosed herein are compounds and methods for using the same for the detection of hydrogen peroxide in situ. The compounds can include compounds of Formula (I), Formula (II), or Formula (III), or a salt thereof, wherein X 1 is a monovalent pro-fluorophore or pro-luminophore moiety; X 2 is a divalent pro-fluorophore or pro-luminophore moiety; each of A and A' is independently represented by formula (IV) or formula (V) :
摘要:
The invention provides fluorogenic compounds and probes that can be used as reagents for measuring, detecting and/or screening superoxide. The fluorogenic compounds of the invention can produce fluorescence colors, such as green, yellow, red, or far-red. The invention further provides fluorogenic compounds for selectively staining superoxide in the mitochondria of living cells. The invention also provides methods that can be used to measure, directly or indirectly, the presence and/or amount of superoxide in chemical samples and biological samples such as cells and tissues in living organisms, and a high-throughput screening methods for detecting or screening superoxide or compounds that can increase or decrease the level of superoxide in chemical and biological samples.
摘要:
Provided herein are improved fluorogenic compounds and probes that can be used as reagents for measuring, detecting and/or screening peroxynitrite. The fluorogenic compounds of the invention can produce fluorescence colors, such as green, yellow, red, or far-red. Also provided herein are fluorogenic compounds for selectively staining peroxynitrite in the mitochondria of living cells. Provided also herein are methods that can be used to measure, directly or indirectly, the presence and/or amount of peroxynitrite in chemical samples and biological samples such as cells and tissues in living organisms. Also provided are high- throughput screening methods for detecting or screening peroxynitrite or compounds that can increase or decrease the level of peroxynitrite in chemical and biological samples.
摘要:
Beta-lactam compounds to detect carbapenemases or microbial carbapenem resistance are disclosed. The compounds contain a chemical probe. Upon hydrolysis by carbapenemases, the compounds undergo intramolecular rearrangement and release the chemical probe. Detection of the released chemical probe indicates the presence of carbapenemases and the presence of microbial carbapenem resistance.
摘要:
Disclosed herein is a novel antifungal compound, derivatives that are used b treat fungal infections. In a specific embodiment, the compound is a small molecule. In a specific embodiment, the compound described herein inhibits yeast to hypha transition under robust hyphal inducing conditions at lower concentration of the molecule. Also disclosed is a composition comprising the antifungal compound. In a specific embodiment, the composition is a pharmaceutical composition Also disclosed is a method of treating and/or preventing fungal infection using the disclosed compound. The disclosed compound exhibits antifungal activity against wide range of fungal species at slightly higher concentrations. Antifungal compound disclose d herein is use d as anti-biofilm agent against fungal infections. In a specific embodiment, the disclosed compound is effective for systemic fungal infections. In a certain embodiment, the disclosed compound is a broad-spectrum antifungal agent for treating topical local and/or systemic fungal infections. In a specific embodiment, the disclosed compound is used in the prevention or treatment of mycotic infections caused by various fungal pathogens.
摘要:
A general, efficient, and environmentally friendly method is provided for producing mostly ß-epoxides of Δ 5 -unsaturated steroids using certain ketones as the catalyst along with an oxidizing agent, or by using certain dioxiranes. In another aspect of the invention, a method is provided for producing mostly 5ß, 6ß-epoxides of steroids from Δ 5 -unsaturated steroids having a substituent at the 3α-position by an epoxidation reaction using a ketone along with an oxidizing agent under conditions effective to generate epoxides, or using a dioxirane under conditions effective to generate epoxides. A whole range of Δ 5 -unsaturated steroids, bearing different functional groups such as hydroxy, carbonyl, acetyl of ketal group as well as different side chains, were conveniently converted to the corresponding synthetically and biologically interesting 5ß, 6ß-epoxides with excellent ß-selectivities and high yields.
摘要:
This invention provides compositions which specifically reacts with peroxynitrite rather than other reactive oxygen species and reactive nitrogen species. This invention also provides related agents for measuring peroxynitrite. This invention also provides related methods for measuring peroxynitrite in a sample, high-throughput screening fluorescent methods for detecting peroxynitrite and high-throughput methods for screening compounds that increase or decrease the production of peroxynitrite comprising using such compositions and agents.