In 2022,Luo, Jingjie; Liu, Pengcheng; Yang, Wenhao; Niu, Hongyu; Li, Shaojie; Liang, Changhai published an article in Frontiers in Chemistry (Lausanne, Switzerland). The title of the article was 《Chemical kinetics and promoted Co-immobilization for efficient catalytic carbonylation of ethylene oxide into methyl 3-hydroxypropionate》.COA of Formula: C4H8O3 The author mentioned the following in the article:
The carbonylative transformation of ethylene oxide (EO) into Me 3- hydroxypropionate (3-HPM) is a key process for the production of 1,3- propanediol (1,3-PDO), which is currently viewed as one of the most promising monomers and intermediates in polyester and pharmaceuticals industry. In this work, a homogeneous reaction system using com. Co2(CO)8 was first studied for the carbonylation of EO to 3-HPM. The catalytic behavior was related to the electronic environment of N on aromatic rings of ligands, where N with rich electron d. induced a stronger coordination with Co center and higher EO transformation. A reaction order of 2.1 with respect to EO and 0.3 with respect to CO was unraveled based on the kinetics study. The 3-HPM yield reached 91.2% at only 40°C by Co2(CO)8 coordinated with 3-hydroxypyridine. However, Cocontaining colloid was formed during the reaction, causing the tough separation and impossible recycling of samples. Concerning the sustainable utilization, Co particles immobilized on pre-treated carbon nanotubes (Co/ CNT-C) were designed via an in situ reduced colloid method. It is remarkable that unlike conventional Co/CNT, Co/CNT-C was highly selective toward the transformation of EO to 3-HPM with a specific rate of 52.2 mmol · g-1 Co · h-1, displaying a similar at. efficiency to that of coordinated Co2(CO)8. After reaction, the supported Co/CNT-C catalyst could be easily separated from the liquid reaction mixture, leading to a convenient cyclic utilization. After reading the article, we found that the author used Methyl 3-hydroxypropanoate(cas: 6149-41-3COA of Formula: C4H8O3)
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. COA of Formula: C4H8O3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics