Since it is known by the investigations of Parry et al. [18] that phthalocyanine compounds are used to cure epoxy-novolac, the presence of reactive amines, carboxyl acids or carboxylic ester groups on the phenol rings of the complex influence the ring opening reaction of the epoxy group.
Both monosaccharides contain orthogonal organic protecting groups, namely carboxylic ester groups (Bz: benzoyl) and benzylic ethers (PMB: p-methoxybenzyl and Bn: benzyl).
The base-catalyzed reactions between α,β-unsaturated ester and aldehyde was employed to synthesize hyperbranched conjugated polymers containing 1,3-butadiene repeating units and carboxylic ester side groups for sensing metal ion Fe3+ [30].
On the basis of the carbon formation mechanism, the C O C bond formed by linkage of OH groups of phenolic compounds preferentially exists at the core of carbon spheres whereas the outer carbon surface contains reactive oxygen functionalities such as hydroxyl, carbonyl, carboxylic, and ester groups, corresponding with results obtained with sugar-derived carbon materials.
Noboritomycin was the first polyether ionophore possessing two carboxylic acid functions on the carbon backbone, namely, a free acid and an additional carboxylic acid ethyl ester group [ 111].
NEXAFS spectra obtained after UV irradiation were compared with those of various molecules containing carbonyl, carboxylic, ester, and anhydride groups.
The IR spectrum of 4 exhibited absorption bands corresponding to hydroxyl (3391 cm−1) and carboxylic ester (1738 cm−1) groups.
The electrolysis of alicyclic ketones (5, 6, 7, and 8-membered rings) with a carboxylic ester and a bromomethyl group was carried out in N, N-dimethylformamide in the presence of a catalytic amount of heptamethyl cobyrinate perchlorate under various reaction conditions.
Peaks at around δ 7.3 and 7.55 were also detected which corresponds to carboxylic acid and ester groups of fatty acids of lipids which assures the glycolipid nature of BS.
