547-64-8Relevant articles and documents
Two-Step Continuous-Flow Synthesis of Fungicide Metalaxyl through Catalytic C?N Bond-Formation Processes
Ishitani, Haruro,Yu, Zhibo,Ichitsuka, Tomohiro,Koumura, Nagatoshi,Onozawa, Shun-ya,Sato, Kazuhiko,Kobayashi, Shū
supporting information, p. 18 - 23 (2021/09/02)
Metalaxyl, an acylalanine fungicide, was synthesized through catalytic continuous sequential-flow reactions. Commonly used syntheses of this compound use batch systems and suffer from problems such as coproduction of halogen-containing by-products derived from acyl and alkyl halides in the substitution reactions of 2,6-dimethylaniline. To minimize waste and enhance efficiency, a halide-free approach including two continuous-flow catalytic processes, heterogeneous Pt-catalyzed reductive alkylation and homogeneous acid-catalyzed amidation with an acid anhydride, was developed. Systematic examination of the two reactions in flow mode enabled a high-yielding, two-step sequential continuous-flow process to be achieved. (Figure presented.).
Conversion of sugars to methyl lactate with exfoliated layered stannosilicate UZAR-S4
Murillo, Beatriz,de la Iglesia, óscar,Rubio, César,Coronas, Joaquín,Téllez, Carlos
, p. 90 - 96 (2020/04/27)
Biomass has been shown as an alternative to fossil fuels for obtaining chemicals. In this work, the transformation of sugars into methyl lactate (ML) at 160 °C was carried out using the layered stannosilicate UZAR-S3 (University of Zaragoza-solid number 3) and the delaminated material UZAR-S4 (University of Zaragoza-solid number 4) obtained from its exfoliation. The exfoliation of UZAR-S3 to UZAR-S4 increased the accessibility of the compounds to the catalytic sites and the medium-strength acidity. Thus, the yield to ML for sucrose transformation increased from 8% for UZAR-S3 to 49.9 % for UZAR-S4. In the reusability tests, the UZAR-S4 catalyst was characterized before and after reaction by several techniques such as X-ray diffraction, thermogravimetry analysis, scanning electronic microscopy, energy dispersive X-ray spectroscopy and nitrogen adsorption. A deactivation of the catalyst was observed, which was related to carbonaceous deposits that decreased the specific surface area and the pore volume of the catalyst.
Compound with litchi fragrance, preparation method of compound and daily essence
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Paragraph 0059-0064; 0080-0081; 0085-0086, (2021/05/12)
The invention relates to the field of spices, in particular to a compound with litchi fragrance, a preparation method of the compound and daily essence. The invention discloses a compound with litchi fragrance. The compound has a structure as shown in a formula (I). Research finds that the compound with litchi fragrance has obvious litchi fragrance, the fragrance intensity is high, and the fragrance is stable and lasting. The invention also provides a preparation method of the compound with litchi fragrance. The raw materials for preparing the compound with litchi fragrance are easy to obtain, the operation is simple, and the compound is suitable for wide popularization and application. The invention further provides a daily essence containing the compound with litchi fragrance.