《Triethylammonium Hydrogen Sulfate [Et3NH][HSO4] as an Efficient Ionic Liquid Catalyst for the Synthesis of Coumarin Derivatives》 was published in Polycyclic Aromatic Compounds in 2020. These research results belong to Karimi-Jaberi, Zahed; Masoudi, Behzad; Rahmani, Atefeh; Alborzi, Kiana. Computed Properties of C7H8O2 The article mentions the following:
Triethylammonium hydrogen sulfate [Et3NH][HSO4] has been studied to be an efficient ionic liquid catalyst for the synthesis of biol. potent coumarin derivatives Thus, 4-substituted coumarins have been synthesized through the Pechmann condensation of phenols with β-ketoesters in the presence of [Et3NH][HSO4]. Also, 4-hydroxycoumarin was reacted with various aldehydes using this catalyst to obtain the α,α’-benzylidene bis(4-hydroxycoumarin) derivatives In addition, this efficient and privileged ionic liquid catalyst has been described in the synthesis of pyrano[3,2-c]coumarin derivatives by condensation of 4-hydroxycoumarin with chalcones. The optimization conditions carried out in the present study revealed that 20 mol% of ionic liquid catalyst under solvent-free condition at 110° are the best conditions for the synthesis of coumarin-derivatives in good to excellent yields. The present methodol. is a facile and green approach offering several advantages, such as excellent yield of products, minimizing production of chem. wastes, shorter reaction profile, mild reaction conditions, simple operational procedure, and easy preparation/separation of catalyst as a non-corrosive and stable ionic liquid After reading the article, we found that the author used m-Methoxyphenol(cas: 150-19-6Computed Properties of C7H8O2)
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)-benzoxazoloneComputed Properties of C7H8O2
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem