Spontaneous Assembly of Rotaxanes from a Primary Amine, Crown Ether and Electrophile was written by Fielden, Stephen D. P.;Leigh, David A.;McTernan, Charlie T.;Perez-Saavedra, Borja;Vitorica-Yrezabal, Inigo J.. And the article was included in Journal of the American Chemical Society in 2018.Reference of 2168-06-1 This article mentions the following:
We report the synthesis of crown ether-ammonium, amide and amine [2]rotaxanes via transition state stabilization of axle-forming reactions. In contrast to the two-step “clipping” and “capping” strategies generally used for rotaxane synthesis, here the components assemble into the interlocked mol. in a single, reagent-less, step under kinetic control. The crown ether accelerates the reaction of the axle-forming components through the cavity to give the threaded product in a form of metal-free active template synthesis. Rotaxane formation can proceed through the stabilization of different transition states featuring 5-coordinate (e.g., SN2) or 4-coordinate (e.g., acylation, Michael addition) carbon. Examples prepared using the approach include crown-ether-peptide rotaxanes and switchable mol. shuttles. In the experiment, the researchers used many compounds, for example, 3,3,3-Tris(4-chlorophenyl)propionic acid (cas: 2168-06-1Reference of 2168-06-1).
3,3,3-Tris(4-chlorophenyl)propionic acid (cas: 2168-06-1) belongs to organic chlorides. Organic chlorides can cause corrosion in pipelines, valves and condensers, and cause catalyst poisoning. The hydrocarbon processing industry (HPI) and others are affected by damage caused by these substances.While alkyl bromides and iodides are more reactive, alkyl chlorides tend to be less expensive and more readily available. Alkyl chlorides readily undergo attack by nucleophiles.Reference of 2168-06-1
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics