Crosslinked films based on N-hydrophobic-O-hydrophilic chitosan derivatives: Preparation, properties and application in banana storage was written by Liu, Qun;Li, Bo;Li, Yan;Yang, Xiaodeng;Wang, Shoujuan;Qiao, Congde;Wang, Nianxing. And the article was included in Food Hydrocolloids in 2023.Application In Synthesis of Calcium (R)-3-(2,4-dihydroxy-3,3-dimethylbutanamido)propanoate This article mentions the following:
Two kinds of N-hydrophobic-O-hydrophilic chitosan derivatives, N-2-hydroxypropyl-3-Bu ether-O-carboxymethyl chitosan (HBCC) and N-2-hydroxypropyl-3-(2-ethylhexyl glycidyl ether)-O-carboxymethyl chitosan (H2ECC) were synthesized and crosslinked with glutaraldehyde to prepare HBCC and H2ECC films. The properties of the crosslinked films, including microstructure, mech. properties, water vapor permeability, swelling property, light transmission, wettability, thermal stability, antibacterial property, and biocompatibility were characterized. The uncrosslinked HBCC and H2ECC films were used as controls. The results showed that the crosslinked films had tight structures, low water vapor permeability, strong water resistance, high UV light resistance, a slight decrease in visible light transmittance, and a small contact angle. The crosslinked films showed strong antibacterial activity against S. aureus and E. coli, non-toxicity to endothelial cells, and good biodegradability. Also, the crosslinked films can effectively prolong the fresh-keeping time of bananas by delaying the formation of soluble polysaccharides and malondialdehyde (MDA) in bananas. These results indicate that HBCC and H2ECC crosslinked films are potential biodegradable materials for fruit preservation. In the experiment, the researchers used many compounds, for example, Calcium (R)-3-(2,4-dihydroxy-3,3-dimethylbutanamido)propanoate (cas: 137-08-6Application In Synthesis of Calcium (R)-3-(2,4-dihydroxy-3,3-dimethylbutanamido)propanoate).
Calcium (R)-3-(2,4-dihydroxy-3,3-dimethylbutanamido)propanoate (cas: 137-08-6) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. A multistep synthesis may use Grignard-like reactions to form an alcohol with the desired carbon structure, followed by reactions to convert the hydroxyl group of the alcohol to the desired functionality.Application In Synthesis of Calcium (R)-3-(2,4-dihydroxy-3,3-dimethylbutanamido)propanoate
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts