In 2022,Sharapov, Ainur D.; Fatykhov, Ramil F.; Khalymbadzha, Igor A.; Sharutin, Vladimir V.; Santra, Sougata; Zyryanov, Grigory V.; Chupakhin, Oleg N.; Ranu, Brindaban C. published an article in Green Chemistry. The title of the article was 《Mechanochemical synthesis of coumarins via Pechmann condensation under solvent-free conditions: an easy access to coumarins and annulated pyrano[2,3-f] and [3,2-f]indoles》.Safety of m-Methoxyphenol The author mentioned the following in the article:
A green protocol has been developed for the synthesis of simple coumarins, e.g., I linear pyrano[2,3-f] and [3,2-f]indoles by the reaction of phenol derivatives ROH (R = 3,5-(OH)2C6H3, 4-Br-3-OHC6H3, 3-OMeC6H4) with β-ketoesters, e.g., cyclohexanecarboxylic acid, 2-oxo-, Et ester under ball milling at ambient temperature in the presence of methanesulfonic acid as a mild acid catalyst. The significant advantages of this procedure are high yields, scalability, no use of hazardous acids or solvents, shorter reaction time, ambient temperature, low cost, and straightforward purification without column chromatog. This procedure is associated with high EcoScale metrics and a low E-factor. In contrast to traditional Pechmann condensation procedures, the mechanochem. protocol leads to the synthesis of pyranoindoles with excellent regioselectivity and high yields.m-Methoxyphenol(cas: 150-19-6Safety of m-Methoxyphenol) was used in this study.
m-Methoxyphenol(cas: 150-19-6) may be used in synthesis of:C(4) symmetric calix[4]resorcinarene, 2-nitroso-5-methoxyphenol, 6-methoxy-2(3H)-benzoxazoloneSafety of m-Methoxyphenol
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem