In 2019,Angewandte Chemie, International Edition included an article by Sang, Ruocheng; Korkis, Stamatis E.; Su, Wanqi; Ye, Fei; Engl, Pascal S.; Berger, Florian; Ritter, Tobias. Application In Synthesis of 2-Methoxybenzaldehyde. The article was titled 《Site-selective C-H Oxygenation via Aryl Sulfonium Salts》. The information in the text is summarized as follows:
Herein, we report a two-step process forming arene C-O bonds in excellent site-selectivity at a late-stage. The C-O bond formation is achieved by selective introduction of a thianthrenium group, which is then converted into C-O bonds using photoredox chem. Electron-rich, -poor and -neutral arenes as well as complex drug-like small mols. are successfully transformed into both phenols and various ethers. The sequence differs conceptually from all previous arene oxygenation reactions in that oxygen functionality can be incorporated into complex small mols. at a late stage site-selectively, which has not been shown via aryl halides. In the experimental materials used by the author, we found 2-Methoxybenzaldehyde(cas: 135-02-4Application In Synthesis of 2-Methoxybenzaldehyde)
2-Methoxybenzaldehyde(cas: 135-02-4) is used as a flavor agent in foods including nonalcoholic/alcoholic beverages, baked goods, chewing gum, confections, frozen dairy, fruit ices, hard/soft candy, instant coffee, tea, Jams, jellies, and milk products. It also has been used to obtain good enantioselectivities using Cu(OAc)(2)-bis(oxazolines) via hydrogen bonding in asymmetric Henry reaction.Application In Synthesis of 2-Methoxybenzaldehyde
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem