Henry reaction

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Master's thesis of Applied Science: The Synthesis and antimicrobial activity of nitropropenyl arenes and related compounds

This history of antimicrobials is marked with impressive discoveries, the majority of which have their origin in natural products. However in this work, the antimicrobial activity of β- nitrostyrenes and related compounds of synthetic origin is reviewed and investigated with a particular focus on the influence of fluorine functionality. Various fluorinated β-methyl-β-nitrostyrene compounds were prepared, their minimum inhibition concentration in cultures of Gram positive, Gram negative and a fungus and their lipophilicity was determined.

133p runthenight05 01-03-2023 3 2 Download

Asymmetric Henry reaction catalyzed by Cu(I)-based chiral amino alcohol complex

The Cu(I)-based complex prepared from (S)-2-(furan-2-yl-methylamino)-2-phenylethanol (5c) and CuCl was used as catalyst in enantioselective Henry reactions of arylaldehydes and nitromethane, which gave 89% ee and 95% yield at ambient temperature. The proposed catalytic cycle of an asymmetric Henry reaction was suggested.

12p langthannam 29-12-2021 10 1 Download

Synthesis of novel chiral bisoxazoline ligands with a norbornadiene backbone: use in the copper-catalyzed enantioselective Henry reaction

Novel chiral bisoxazoline ligands based on norbornadiene were synthesized and used for the asymmetric Henry reaction. Various aromatic aldehydes were converted into chiral β -nitro alcohols with high yields and moderate to acceptable enantioselectivities under the optimized reaction conditions. The short and efficient synthesis of bisoxazoline ligands, the flexibility in ligand design, coordination to a large number of transition metals, and excellent enantioselectivity in many reactions make these ligands indispensable in asymmetric catalysis.

14p langthannam 29-12-2021 7 0 Download
Organotemplate-free Cs-ABW nanozeolite as highly reactive and recyclable catalyst for Henry reaction between benzaldehyde and nitroethane

Zeolite Cs-ABW nanocatalyst has been hydrothermally synthesized without using any harmful organic template. The zeolite nanocrystal with very high solid yield (81.88%) can be obtained within 60 min and at 180°C (~20 atm), conditions that are much faster and gentler than the existing synthesis methods. The orthorhombic Cs-ABW nanocrystals (mean size of 32 nm) have high aluminum content (Si/Al ratio = 1.14) and possess high basicity.

14p tudichquannguyet 29-11-2021 7 1 Download
Organic compound alteration during hypervelocity collection of carbonaceous materials in aerogel

The coexisting systemof VOCs is complex. A small change in environmental conditions (e.g., temperature) may result in changes on VOC concentrations, and also some VOCs may be involved in chemical reactions during the trans- portation. Meanwhile, as a consequence of high density of petroleumrefineries, synthetic organic chemical plants, and variousmobile sources, the formation rate and concentration of ozone in theHouston area are extremely high, and propene becomes a dominant reactive hydrocarbon (20).

10p cao_can 02-01-2013 58 3 Download
Ozone Reaction Kinetics for Water and Wastewater Systems - Chapter 5

Chế độ động trong phản ứng Ozonation trực tiếp Trong chương này, động học của phản ứng ôzôn trực tiếp trong nước được xử lý cụ thể, xem xét các chế độ động học khác nhau mà các phản ứng ôzôn hiện tại. Mục tiêu chính của ozonation động học tập trung vào việc xác định các thông số, chẳng hạn như là hằng số tốc độ phản ứng và hệ số chuyển hàng loạt. Như là một bước đầu tiên, cách để ước tính tài sản ozone và liên tục hòa tan hoặc cân bằng (Henry của pháp luật) được...

44p hoakimthienduong 19-12-2011 95 12 Download