Hsueh, Nai-Chen et al. published their research in Advanced Synthesis & Catalysis in 2020 | CAS: 57179-35-8

3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Recommanded Product: 57179-35-8

PdCl2/CuCl2/Bi(OTf)3-promoted Construction of Sulfonyl Dibenzooxabicyclo[3.3.1]nonanes and Arylnaphthalenes via Intramolecular Annulation of Sulfonyl o-Allylarylchromanones was written by Hsueh, Nai-Chen;Chang, Meng-Yang. And the article was included in Advanced Synthesis & Catalysis in 2020.Recommanded Product: 57179-35-8 This article mentions the following:

PdCl2/CuCl2/Bi(OTf)3-promoted intramol. domino annulation of sulfonyl o-allylarylchromanones, e.g., I provides tetracyclic sulfonyl dibenzooxabicyclo[3.3.1]nonanes, e.g., II and bicyclic arylnaphthalenes, e.g., III with good to excellent yields in MeOH at room (25°C) and refluxing (65°C) temperature, resp. The starting sulfonyl o-allylarylchromanones, e.g., I can be easily obtained from the intermol. cyclocondensation of α-sulfonyl o-hydroxyacetophenones, e.g., 1-(5-chloro-2-hydroxyphenyl)-2-[(4-methylphenyl)sulfonyl]ethanone and o-allylbenzaldehydes, e.g., 3,4-dimethoxy-2-allylbenzaldehyde. The uses of various catalysts and solvent systems are investigated herein for convenient transformation. A plausible mechanism is proposed and discussed. This protocol provides one-pot ring closure via carbon-carbon (C-C) bond formation. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8Recommanded Product: 57179-35-8).

3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Recommanded Product: 57179-35-8

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem