Nifant’ev, Ilya E.; Shlyakhtin, Andrey V.; Bagrov, Vladimir V.; Tavtorkin, Alexander N.; Ilyin, Sergey O.; Gavrilov, Dmitry E.; Ivchenko, Pavel V. published an article in 2021. The article was titled 《Cyclic ethylene phosphates with (CH2)nCOOR and CH2CONMe2 substituents: synthesis and mechanistic insights of diverse reactivity in aryloxy-Mg complex-catalyzed (co)polymerization》, and you may find the article in Polymer Chemistry.Product Details of 6149-41-3 The information in the text is summarized as follows:
A novel pathway is proposed for the formation of branched poly(ethylene phosphate)s during the coordination ring-opening polymerization (ROP) of ethylene phosphates catalyzed by a 2,6-di-tert-butyl-4-methylphenoxy (BHT) magnesium complex, [(BHT)Mg(μ-OBn)(THF)]2 (Mg1). Electron-donating fragments in the substituents at the P atom of the ethylene phosphates and the stability of chelate Mg complexes were hypothesized to drive the formation of ethylene phosphate macromonomers. This hypothesis was validated through a comparative exptl. and theor. study of the ROP reactivity of the ethylene phosphates with -O(CH2)nCOOMe (n = 1-3, 5), -CH2COOtBu, -OCHMeCOOMe, and -OCH2CONMe2 substituents (1-7). In good agreement with the results of theor. modeling, glycolate- and lactate-substituted ethylene phosphates 1, 5, and 6 formed highly branched polymers, and the participation of the BHT-Mg glycolate intermediate in ROP was confirmed by the presence of -P(O)(OCH2COOMe)2 fragments in the homopolymer of 1. Notably, the reaction of amide-substituted 7 with Mg1 quant. afforded benzyl ethylene phosphate without subsequent ROP. The copolymerization of 1 with Et ethylene phosphonate furnished branched polymers, the architectures of which were determined by spectral and rheol. studies. Consequently, new -OCH2COX substituted cyclic phosphates can be used as efficient branching (X = OR) or chain termination (X = NR2) agents. In the experiment, the researchers used Methyl 3-hydroxypropanoate(cas: 6149-41-3Product Details of 6149-41-3)
Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 6149-41-3
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