Yaseen, Anaheed A.; Al-Tikrity, Emaad T. B.; Yousif, Emad; Ahmed, Dina S.; Kariuki, Benson M.; El-Hiti, Gamal A. published their research in Polymers (Basel, Switzerland) in 2021. The article was titled 《Effect of Ultraviolet Irradiation on Polystyrene Containing Cephalexin Schiff Bases》.Reference of 3-Hydroxybenzaldehyde The article contains the following contents:
Synthesis and application of new UV photostabilizers for polystyrene and this research was focused on four cephalexin Schiff bases I [Ar = 3-OHC6H4, 4-BrC6H4, 4-OMeC6H4, 4-NMe2C6H4]. The reaction of cephalexin and 3-hydroxybenzaldehyde, 4-dimethylaminobenzaldehyde, 4-methoxybenzaldehyde, and 4-bromobanzaldehyde under acidic condition afforded the corresponding Schiff bases I in high yields. The Schiff bases were characterized and their surfaces were examined The Schiff bases were mixed with polystyrene to form homogenous blends and their effectiveness as photostabilizers was explored using different methods. The methods included monitoring the changes in the IR spectra, weight loss, depression in mol. weight, and surface morphol. on irradiation In the presence of the Schiff bases, the formation of carbonyl group fragments, weight loss, and decrease in mol. weight of polystyrene were lower when compared with pure polystyrene. In addition, undesirable changes in the surface such as the appearance of dark spots, cracks, and roughness were minimal for irradiated polystyrene containing cephalexin Schiff bases. Mechanisms by which cephalexin Schiff bases stabilize polystyrene against photodegradation was also suggested. The experimental part of the paper was very detailed, including the reaction process of 3-Hydroxybenzaldehyde(cas: 100-83-4Reference of 3-Hydroxybenzaldehyde)
3-Hydroxybenzaldehyde(cas: 100-83-4) can be used as a reactant along with ethyl acetoacetate and thiourea in the synthesis of corresponding dihydropyrimidine-2-thione (monastrol), using Yb(OTf)3 as a catalyst by Biginelli cyclocondensation reaction.Reference of 3-Hydroxybenzaldehyde
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