Phase-Transfer Catalysis: Fundamentals II

Synthesis, Phase-Transition Behaviour, and Oil Adsorption Performance of Porous Poly(oligo(ethylene glycol) Alkyl Ether Acrylate) Gels

“…The gel does not swell over 70 °C. Poly(ethylene oxide) and its analogues are known to catalyse polymeric phase transfer [ 39 ] because they can complex easily with metal ions such as alkali metal or alkaline earth metal ions. In our system, the pendant oligo (ethylene glycol) methyl ether chains should similarly form complexes with metal ions.…”

Palladium mediated domino reaction: synthesis of isochromenes under aqueous medium

“…In general, quaternary ammonium salts (QX; X = Cl, Br, I and HSO 4 ) can act as a phase transfer catalyst mostly when the solvent is water or also can act as an additive to accelerate the catalytic activity of metal-catalyst. 18 With this viewpoint in our mind, firstly, the alcohol 1a and diphenylacetylene 2a were treated at different temperatures using Pd(OAc) 2 catalyst (5 mol%), tetrabutylammonium iodide (TBAI) (1 equiv. ), base K 2 CO 3 (4 equiv.)…”

Strategic Possibility Routes of Recycled PET

“…One of the essential methods in organic synthesis is phase-transfer catalysis. In the manufacture of fine chemical, it will be easier that can be used two immiscible phases, for instance, liquid-liquid and solid-liquid, in the presence of a chain transfer agent, which can be a quaternary ammonium salt or crown ether [ 129 , 130 , 131 , 132 ]. The effect of quaternary ammonium salt as a phase-transfer catalyst for the microwave depolymerization of PET waste bottles had been studied by Khalaf et al The PET was depolymerized to TPA and EG by hydrolysis process using 10% NaOH and ammonium salt as phase-transfer catalyst under microwave irradiation, which PET conversion was up to 99% [ 133 ].…”