A new platinum catalyst based on poly{acrylamide-co-[3-(acryloylamino)propyltrimethylammonium chloride]} for the gas-phase reduction of nitrobenzene, phenol and the hydrodechlorination of aromatic compounds

Copper‐Catalyzed Oxybromination and Oxychlorination of Primary Aromatic Amines Using LiBr or LiCl and Molecular Oxygen

“…[4] Aromatic haloamines are used for the manufacture of polyurethanes, rubber chemicals, agricultural products and drugs. [5,6] Historically, primary amines, due to their high reactivity, were converted to the corresponding anilides if monohalogenated products were desired in conventional electrophilic aromatic substitutions. [7] However, in recent years, several methods have been developed allowing one to control polybromination of unprotected anilines and obtain monosubstituted derivatives in high yields.…”

“…[12][13][14][15][16][17][18][19][20] As far as chloro-A C H T U N G T R E N N U N G anilines are concerned, they are usually produced by the hydrogenation of corresponding chloronitrobenzenes; however, this process is heavily complicated by a concomitant hydrodechlorination reaction so that it still remains a big challenge to leave intact carbonchlorine bonds and selectively reduce a nitro group in the same molecule. [2,5,21] In oxidative halogenation, halide ions can be used as a halogen source together with a suitable oxidant; thus, this method represents more ecologically benign and economically attractive pathway to haloaromatics than classical electrophilic substitutions. Main advantages of oxyhalogenation, which make it safer and greener, are the use of low value and easy to handle metal halides as halogenating agents and atom economy, i.e., a full utilization of halogen atoms instead of using only half of the available amount.…”

On the promoting effect by quaternary ammonium salts in the multiphase hydrodechlorination with hydrogen gas on Raney nickel catalyst

“…Ammonia solutions or ammonium salts only caused inhibition (see entries 11,12). The reaction occurred in the presence of ammonia which was used as a base in the presence of Aliquat 336 (entry 13), however, it ceased when the extent of conversion reached 60%.…”

“…On the other hand, colloidal nanoparticles of Pd can also be stabilized in solution by the quaternary salts (ionic liquids), resulting in an efficient catalytic system, for example, as used in C-C bond forming reactions [11]. Coordination of Pd(0) by quaternary ammonium or amine functions has also been used for the preparation of supported Pd on polymers and zeolites [12,13].…”

Reviews on Fuel Cell Technology for Valuable Chemicals and Energy Co-Generation

“…In additional, CHA can help human from syncytitrophoblast [54]. CHA is also utilized as a polyamide polymerization chain terminator that controls polymer molecular weight [55]- [57]. Many researches showed that co-generation of CHA and electrical energy can be obtained in a PEMFC which was selective with reduction of nitrobenzene (NB) [58].…”