Kết quả nghiên cứu phổ hồng ngoại của DES điều chế cho thấy có sự hình thành tương tác liên kết hydrogen phân tử giữa L-proline và acid para-toluenesulfonic. Điều kiện thực hiện phản ứng tốt nhất thu được sau khi khảo sát: nhiệt độ 80oC, thời gian 120 phút, tỉ lệ benzaldehyde:o-phenylenediamine=2:1 (mmol) lượng xúc sử dụng là 30% mol so với o-phenylenediamine. Xúc thể 4 lần mà không thay đổi ho...

A practical approach has been developed to convert glucals and rhamnals into disaccharides or glycoconjugates with high a-selectivity and yields (77–97%) using a trans-fused cyclic 3,4-O-disiloxane protecting group and TsOH·H2O (1 mol%) as a catalyst. Control of the anomeric selectivity arises from conformational locking of the intermediate oxacarbenium cation. Glucals outperform rhamnals becau...

The synthesis of a biobased aliphatic polyester, poly (hexamethylene sebacate) (PE 6-10) via esterification and alcoholysis reaction steps by reactive extrusion is reported. overall time was decreased down to around 14 min instead roughly 360 in classical batch reactor. A number average molar mass 21,100 g.mol?1 has been reached. operating conditions were first optimized through reactors synthe...

Bis(phosphinidene)-capped triiron carbonyl clusters, including electron rich derivatives formed by substitution with chelating diphosphines, have been prepared and examined as proton reduction catalysts. Treatment of the known cluster [Fe3(CO)9(µ3-PPh)2] (1) various diphosphines in refluxing THF (for 5, toluene) afforded new clusters [Fe3(CO)7(µ3-PPh)2(κ2-dppb)] (2), [Fe3(CO)7(µ3-PPh)2(κ2-dppv)...

One of the promising types vegetable raw materials in Ukraine, which can be used for development resource-saving technologies, are oils. The products their processing serve as obtaining surface-active substances, production food additives, pharmaceutical products, detergents and cosmetics, biofuels additives. most common oil Ukraine is sunflower, which, like other oils, processed to form fatty ...

A novel encapsulated deep eutectic solvent (DES) was introduced for biodiesel production via a two-step process. The DES in medical capsules and were used to reduce the free fatty acid (FFA) content of acidic crude palm oil (ACPO) minimum acceptable level (< 1%). synthesized from methyltriphenylphosphonium bromide (MTPB) p-toluenesulfonic (PTSA). effects pertaining different operating condition...

Strain SY1, identified as a Corynebacterium sp., was isolated on the basis of the ability to utilize dibenzothiophene (DBT) as a sole source of sulfur. Strain SY1 could utilize a wide range of organic and inorganic sulfur compounds, such as DBT sulfone, dimethyl sulfide, dimethyl sulfoxide, dimethyl sulfone, CS2, FeS2, and even elemental sulfur. Strain SY1 metabolized DBT to dibenzothiophene-5-...

BACKGROUND α-Bromination of the side chain of aromatic ketones using NBS in the presence of p-toluenesulfonic acid (p-TsOH) in acetonitrile is very common. However, regioselective bromination of bis and tris(ω-bromoacetophenones) with NBS in the presence of p-TsOH in acetonitrile under microwave irradiation is quite novel. The bis- and tris(ω-bromoacetophenones) are used in synthesis of bis and...