Ester linkage of p-coumaric acid in bamboo lignin was written by Nakamura, Yoshiki;Higuchi, Takayoshi. And the article was included in Holzforschung in 1976.Reference of 3929-47-3 This article mentions the following:
The maximum UV absorption of veratryl p-coumarate [61844-60-8] and 3-(3,4-dimethoxyphenyl)propyl p-coumarate [61844-61-9] as model compounds to establish the mode of ester linkage between p-coumaric acid (I) [7400-08-0] and phenylpropane moieties of MWL (II) [8068-00-6] of Phyllostachys pubesens, together with other 5 esters of I, were present at 312-14 nm which correspond to that of II, suggesting that the major portion (∼80%) of I was esterified with γ-OH groups of side chains, especially of α,β-saturated ones, in II mols. Similar results were obtained for the esterified p-hydroxybenzoic acid in poplar lignin (III) [9005-53-2]. The precipitation of the ester linkage, through which I is connected to coniferyl alc. end group in III, was also discussed. In the experiment, the researchers used many compounds, for example, 3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3Reference of 3929-47-3).
3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Reference of 3929-47-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem