The industrial and technological applications of chitosan have been exploited for decades, for example, in the production of cosmetics, drugs, and medicines, food additives, semipermeable membranes, in the development of biomaterials used in Schiff base reactions to produce salicylaldehyde
derivatives , as a drug delivery agent for the human body [2, 3], and in the textile industry as an alternative for treating effluents containing dyes .
In order to investigate these potential properties, four new Schiff base phenoxyimine (PHI) ligands were synthesized from the Schiff base condensation reaction between substituted salicylaldehyde
and substituted aniline: 1) ligandl: N-(salicylidene)-3,5-dichloroaniline ([L.
Synthesis and characterization of Schiff bases from chitosan and salicylaldehyde
Various theories exist to explain this name, the more logical being that Spirea is the genus name for the herb meadowsweet, the source of salicylaldehyde
2]) was synthesized as described in literature in ethanol medium from salicylaldehyde
For example salicin is found in Salix spp, Populus spp, Viola spp, and Viburnum spp; fraxin is found in Fraxinus spp; and both spiraein and salicylaldehyde
are found in Filipendula spp.
One of the most widely used ligand classes are C2-symmetric salens, double Schiff base derivatives from chiral, vicinal diamines and two salicylaldehyde
In this connection, a known coumarin derivative (3-carbethoxycoumarin) was synthesized by reacting for a few minutes salicylaldehyde
and diethyl malonate in presence of sodium acetate and acetic anhydride in a microwave oven.
Secreted from surface glands by the beetle larvae, salicylaldehyde
deters ants and probably other arthropod predators such as wasps from attacking the larvae, say the researchers.
5-Bromo H [FORMULA NOT 213 salicylaldehyde
REPRODUCIBLE IN ASCII] 5.
N-(4-n-alkyloxy salicylidene) 4'-n-alkoxyanilines obtained by the 1:1 condensation of 4-n-alkyloxy salicylaldehyde
and 4-n-alkoxyanilines viz.
gave the 5-nitro derivative of 70% (HN[O.