Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

Chemists from the USA, South Korea, Hungary and Switzerland have developed a heterogeneous ruthenium-based catalyst for the synthesis of cyclic polymers from cyclopentene. They also managed to come up with a reaction installation that makes it easy to separate the catalyst from the reaction products. The study was published in Nature Chemistry. Linear polymers containing… Continue reading Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

Chemists have found ideal conditions for the hydrogen borrowing reaction

Chemists from Russia studied the hydrogen borrowing reaction necessary for the formation of carbon-nitrogen bonds. They found that it often does not require a catalyst at all, and also developed recommendations for successfully carrying out the reaction in the laboratory. The study was published in the journal Journal of Catalysis. Organic compounds containing an NH… Continue reading Chemists have found ideal conditions for the hydrogen borrowing reaction

An organometallic cocatalyst helped produce ammonia by electrolysis

Chemists from the USA have found a cobalt-based cocatalyst, which, together with a tungsten-based catalyst, makes it possible to effectively produce ammonia from nitrogen under electrolysis conditions. Thanks to this combination of catalysts, the process was able to be carried out at a relatively high potential of −1.35 volts and with a current efficiency of… Continue reading An organometallic cocatalyst helped produce ammonia by electrolysis

Chemists have found a new way of prebiotic synthesis of amino acids

A possible route for prebiotic synthesis of amino acids was proposed by chemists from the USA. In a work published in Nature Chemistry, scientists argue that before the emergence of life, amino acids could be obtained from keto acids, and not just from aldehydes, as previously thought. Moreover, the process found is more reminiscent of… Continue reading Chemists have found a new way of prebiotic synthesis of amino acids

Chemists have learned to obtain carbenoids from aldehydes

Chemists from the United States have developed a method for converting aldehydes into unstabilized zinc-based carbenoids. They entered into most of the reactions characteristic of the classical precursors of carbenes – diazo compounds, but turned out to be more stable and more convenient to obtain. The study was published in Science. Carbenes are molecules in… Continue reading Chemists have learned to obtain carbenoids from aldehydes

Copper ions in tap water turned out to be a catalyst in the synthesis of naldemedine

Chemists from Japan were unable to repeat the laboratory synthesis of the drug naldemedine under production conditions. This happened because the tap water in the laboratory contained more copper salts, which could speed up one of the stages of the synthesis. But in the end, chemists managed to optimize the process by adding a copper… Continue reading Copper ions in tap water turned out to be a catalyst in the synthesis of naldemedine

Chemists synthesized puffer fish venom in 22 steps

The nerve poison tetrodotoxin, contained in some species of the pufferfish family, was synthesized in 22 stages with a yield of 11 percent. The synthesis turned out to be one of the shortest in history thanks to a well-chosen cycloaddition reaction, scientists write in Science. Tetrodotoxin causes blockage of sodium channels, and poisoning with it… Continue reading Chemists synthesized puffer fish venom in 22 steps

Chemists have proposed a method for the synthesis of enantiomerically pure catenanes and rotaxanes

Chemists from Great Britain proposed synthesizing enantiomers of catenanes and rotaxanes from chiral starting materials with bulky groups that hinder the rotation of isomeric products. Using this method, scientists obtained enantiomerically pure catenane and rotaxane. The study was published in Nature Chemistry. The chirality of a molecule is its property of not being compatible with… Continue reading Chemists have proposed a method for the synthesis of enantiomerically pure catenanes and rotaxanes

Chemists turned ammonia into amino acids

Chinese chemists have proposed a method for synthesizing amino acids from ammonia. They carried out reactions between diazo compounds and ammonia in the presence of two catalysts – organic and organometallic. As a result, they were able to obtain enantiomers of amino acids in high yields. The study was published in Nature Catalysis. Ammonia is… Continue reading Chemists turned ammonia into amino acids

Chemists made the decanter using a reversible metathesis reaction

Chemists from China and the USA obtained crystalline graphene using the metathesis reaction of alkynes. They were able to achieve a high degree of polymerization and crystallinity of the product by adding an additional monomer. The study was published in the journal Nature Synthesis. Carbon atoms in organic compounds can form single, double, and triple… Continue reading Chemists made the decanter using a reversible metathesis reaction