A Synthesis, Process Optimization, and Mechanism Investigation for the Formation of Polyoxymethylene Dimethyl Ethers

2018 ◽  
Vol 25 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Yang Liu ◽  
Yan Wang ◽  
Wangfeng Cai
Keyword(s):  
Process Optimization ◽  
Synthesis Process ◽  
Polyoxymethylene Dimethyl Ethers

Synthesis, process optimization and characterization of gold nanoparticles using crude fucoidan from the invasive brown seaweed Sargassum muticum

2021 ◽  
Vol 58 ◽  
pp. 102377
Author(s):  
N. González-Ballesteros ◽  
N. Flórez-Fernández ◽  
M.D. Torres ◽  
H. Domínguez ◽  
M.C. Rodríguez-Argüelles
Keyword(s):  
Gold Nanoparticles ◽  
Process Optimization ◽  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Synthesis Process ◽  
Crude Fucoidan

scholarly journals Synthesis process optimization and field trials of insecticide candidate NKY-312

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Haiqi Wang ◽  
Hongjian Song
Keyword(s):  
Process Optimization ◽  
Field Experiments ◽  
Simple Structure ◽  
Field Trials ◽  
Synthesis Process ◽  
Toxicity Tests ◽  
Synthetic Route ◽  
Highly Active ◽  
Scale Preparation

AbstractNKY-312 is a highly active insecticide candidate with a simple structure. In order to carry out field trials and toxicity tests, its scale preparation is urgently needed, but the final step of the original synthetic route is a low-yielding sulfonylation reaction that generates a high proportion of a bissulfonylated by-product, its foliar contact activities against bean aphid (80% at 100 mg/kg) is significantly lower than that of NKY-312 (100% at 5 mg/kg), and uses pyridine as the solvent. In this work, we developed a highly selective (4-dimethylaminopyridine)-catalyzed monosulfonylation reaction that avoids the use of pyridine as a solvent and shows a much higher yield (98% yield with 98% HPLC purity) than the original reaction (68%). Then, we carried out the field trials and toxicity tests. In field experiments, the activities of NKY-312 against rice planthopper and wheat aphid were equal to pymetrozine and imidacloprid respectively.

scholarly journals OTIMIZAÇÃO DO PROCESSO DE SÍNTESE E CARACTERIZAÇÃO DE MCM-48 / SYNTHESIS PROCESS OPTIMIZATION AND CHARACTERIZATION OF THE MCM-48

2021 ◽  
Vol 7 (1) ◽  
pp. 3455-3468
Author(s):  
Ingrid Francine Araujo de Oliveira ◽  
Bruna Vilela dos Santos ◽  
José Martins de Oliveira Júnior ◽  
Marta Maria Duarte Carvalho Vila ◽  
Valquíria Miwa Hanai-Yoshida
Keyword(s):  
Process Optimization ◽  
Synthesis Process
Sign in / Sign up

Export Citation Format

Share Document