An article Microwave accelerated the solvent-free synthesis of 4-aryl-3,4-dihydrocoumarin via the tandem reaction of cinnamic acids with phenols catalyzed by Amberlyst 15 resin WOS:000667062100001 published article about ONE-POT SYNTHESIS; MEDIATED HYDROARYLATION; ASYMMETRIC-SYNTHESIS; DIHYDROCOUMARINS; COUMARINS; DERIVATIVES; EFFICIENT; 4-ARYL-3,4-DIHYDROBENZOPYRAN-2-ONES; 3,4-DIHYDROCOUMARINS; FLAVONOIDS in [Huu-Phuoc Le; Cong-Thang Duong; Xuan-Triet Nguyen; Thi Xuan Thi Luu] Univ Sci, Dept Organ Chem, Ho Chi Minh City, Vietnam; [Thi Xuan Thi Luu] Vietnam Natl Univ, Dept Chem, Ho Chi Minh City, Vietnam in 2021.0, Cited 55.0. Category: indole-building-block. The Name is Mequinol. Through research, I have a further understanding and discovery of 150-76-5
Amberlyst 15 resin supported the tandem reaction of cinnamic acids with phenols under solvent-free reaction condition has been introduced to afford 4-aryl-3,4-dihydrocoumarin (neoflavanone) derivatives. The efficiency of solid acidic sulfonic resin (A-15) has been illustrated in two reaction activation methods such as microwave irradiation and conventional heating. The important roles of Amberlyst 15 have been emphasized strongly through the high yields of 4-aryl-3,4-dihydrocoumarin in the shorter time under the assistance of microwave irradiation than of conventional heating, and its high recovery and reusability for six catalyst runs. The original catalyst as well as the recycled catalyst were characterized by XRD and FE-SEM to study the correlation of the surface of reused catalyst and its recyclability.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles