29194-41-0

Upstream product

• 79-04-9 chloroacetyl chloride 
• 124-30-1 1-aminooctadecane 
• 7572-29-4 dichloroethyne 

Relevant academic research and scientific papers

Tuning the supramolecular chirality of one-and two-dimensional aggregates with the number of stereogenic centers in the component porphyrins

A synthetic strategy was developed for the preparation of porphyrins containing between one and four stereogenic centers, such that their molecular weights vary only as a result of methyl groups which give the chiral forms. The low-dimensional nanoscale a

NOVEL PSEUDO-CERAMIDE COMPOUND AND METHOD FOR PREPARING THE SAME

The present invention provides a novel pseudo-ceramide compound represented by Chemical Formula 1, an isomer thereof, a pharmaceutically acceptable salt thereof, a pro-drug thereof, a hydrate thereof, and a solvate thereof. [Chemical Formula 1] (In Chemical Formula 1, R is a C9 to 17 saturated or unsaturated aliphatic chain, and R′ is an amino group or an alkoxy group having a C10 to 18 saturated aliphatic chain.) According to the present invention, the novel pseudo-ceramide compound has a skin protecting effect by having excellent stability, dissolubility, and skin moisturization, so that the novel pseudo-ceramide compound can be used as an active ingredient for protecting the skin from external stimuli without side effects, preventing the skin from damage, and recovering damaged skin. Accordingly, the novel pseudo-ceramide compound can be used as a skin-moisturizing composition for external application on skin, a cosmetic composition, or a pharmaceutical composition.

Synthesis and properties of 1-(2-(alkylamino)-2-oxoethyl) pyridinium chloride surfactants

A series of 1-(2-(alkylamino)-2-oxoethyl) pyridinium chloride surfactants was designed and synthesised by two steps. Four new compounds were obtained. The structures of all the synthesised compounds have been characterised by IR, 1H NMR and elemental analyses. Surface activity and antibacterial activity of 1-(2-(alkylamino)-2-oxoethyl) pyridinium chloride surfactants were investigated. The critical micelle concentration and C20 values of the synthesised surfactants are low. The synthesised surfactants have good antibacterial activity for sulfate-reducing bacteria, metatrophic bacteria and iron bacteria in oil field injection water.

Chemical and constitutional influences in the self-assembly of functional supramolecular hydrogen-bonded nanoscopic fibres

A new series of secondary amides bearing long alkyl chains with π-electron-donor cores has been synthesized and characterised, and their self-assembly upon casting at surfaces has been studied. The different supramolecular assemblies of the materials have been visualized by using atomic force microscopy (AFM) and transmission electron microscopy (TEM). It is possible to obtain well-defined fibres of these aromatic core molecules as a result of the hydrogen bonds between the amide groups. Indeed, by altering the alkyl-chain lengths, constitutions, concentrations and solvent, it is possible to form different rodlike aggregates on graphite. Aggregate sizes with a lower limit of 6-8 nm width have been reached for different amide derivatives, while others show larger aggregates with rodlike morphologies which are several micrometers in length. For one compound that forms nanofibres, doping was 'performed by using a chemical oxidant, and the resulting layer on graphite was shown to exhibit metallic-like spectroscopy curves when probed with current-sensing AFM. This technique also revealed current maps of the surface of the molecular material. Fibre formation not only takes place on the graphite surface: nanometre scale rods have been imaged by using TEM on a grid after evaporation of solutions of the compounds in chloroform. Molecular modelling proves the importance of the hydrogen bonds in the generation of the fibres, and indicates that the constitution of the molecules is vital for the formation of the desired columnar stacks, results that are consistent with the images obtained by microscopic techniques. The results show the power of noncovalent bonds in self-assembly processes that can lead to electrically conducting nanoscale supramolecular wires.

Soft antimicrobial agents: Synthesis and activity of labile environmentally friendly long chain quaternary ammonium compounds

A series of soft quaternary ammonium antimicrobial agents, which are analogues to currently used quaternary ammonium preservatives such as cetyl pyridinium chloride and benzalkonium chloride, were synthesized. These soft analogues consist of long alkyl chain connected to a polar headgroup via chemically labile spacer group. They are characterized by facile nonenzymatic and enzymatic degradation to form their original nontoxic building blocks. However, their chemical stability has to be adequate in order for them to have antimicrobial effects. Stability studies and antibacterial and antiviral activity measurements revealed relationship between activity, lipophilicity, and stability. Their minimum inhibitory concentration (MIC) was as low as 1 μg/mL, and their viral reduction was in some cases greater than 6.7 log. The structure-activity studies demonstrate that the bioactive compounds (i.e., MIC for Gram-positive bacteria of 10μg/mL) have an alkyl chain length between 12 and 18 carbon atoms, with a polar headgroup preferably of a small quaternary ammonium group, and their acquired inactivation half-life must be greater than 3 h at 60 °C.

REACTIONS OF DICHLOROACETYLENE WITH PRIMARY ALIPHATIC AMINES

Primary aliphatic amines are good nucleophilic reagents which easily react with dichloroacetylene (DCA).The reactions of DCA with primary aliphatic amines have been studied and a mechanism of these reactions has been proposed and discussed.