Polyacrylonitrile fiber with strongly acidic electrostatic microenvironment: Highly efficient and recyclable heterogeneous catalyst for the synthesis of heterocyclic compounds was written by Xiao, Jian;Xu, Gang;Wang, Lu;Li, Pengyu;Zhang, Wenqin;Ma, Ning;Tao, Minli. And the article was included in Journal of Industrial and Engineering Chemistry in 2019.SDS of cas: 638-07-3 The following contents are mentioned in the article:
Four categories of sulfonic acid functionalized fiber catalysts with different surface microenvironments were synthesized by covalent grafting using polyacrylonitrile fiber (PANF) as the support. After the effect of acid structure on catalytic activity was investigated by Friedlander reaction, PANEOSF was chosen for the synthesis of quinolines and coumarin derivatives with high yields and extensive substrate scope (51 examples) in ethanol or water. The effect of electrostatic microenvironment and solvent was discussed and a “release-catch-release-catch” catalytic pattern was proposed accordingly. PANEOSF can be easily recycled for 20 times without any decrease of catalytic activity. This study involved multiple reactions and reactants, such as Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3SDS of cas: 638-07-3).
Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3) belongs to organic chlorides. Organochlorines are organic compounds having multiple chlorine atoms. They were the first synthetic pesticides that were used in agriculture. They are resistant to most microbial and chemical degradations. Aliphatic organochlorides are often alkylating agents as chlorine can act as a leaving group, which can result in cellular damage.SDS of cas: 638-07-3
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics