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
作者:Huu-Phuoc Le、Cong-Thang Duong、Xuan-Triet Nguyen、Thi Xuan Thi Luu
DOI:10.1080/00397911.2021.1925918
日期:2021.7.18
Abstract Amberlyst15 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
p-Toluenesulfonic acid mediated hydroarylation of cinnamic acids with anisoles and phenols under metal and solvent-free conditions
作者:Arun R. Jagdale、Arumugam Sudalai
DOI:10.1016/j.tetlet.2007.05.059
日期:2007.7
Hydroarylation of cinnamic acids with anisoles and phenols mediated by p-toluenesulfonic acid (p-TSA) under metal and solvent-free conditions gave 3-(4-methoxyphenyl)-3-phenylpropanoic acids and dihydrocoumarins, respectively, in high yields and excellent selectivity.
Platinum‐Catalyzed Desaturation of Lactams, Ketones, and Lactones
作者:Ming Chen、Alexander J. Rago、Guangbin Dong
DOI:10.1002/anie.201811197
日期:2018.12.3
desaturation of N‐protected lactams, ketones, and lactones to their conjugated α,β‐unsaturated counterparts is reported. The reaction operates under mildly acidic conditions at room temperature or 50 °C. It is scalable and tolerates a wide range of functional groups. The complementary reactivity to the palladium‐catalyzed desaturation is demonstrated in the efficient conversion of iodide, bromide, and sulfur‐containing
Solvent-free synthesis of 4-aryl-3,4-dihydrobenzopyran-2-ones via [3+3] cyclocoupling of phenols with cinnamic acid catalyzed by molecular iodine
作者:Durga P. Kamat、Santosh G. Tilve、Vijayendra P. Kamat
DOI:10.1016/j.tetlet.2012.06.069
日期:2012.8
Molecular iodine was used as a catalyst in the [3+3] cyclocoupling of phenols and cinnamicacids which proceeds via a tandem esterification–hydroarylation process at 120–130 °C under solvent-free conditions. Substituted 4-aryl-3,4-dihydrobenzopyran-2-ones were obtained in good yields.
Hydroarylation of cinnamic acid with phenols catalyzed by acidic ionic liquid [H-NMP]HSO4: computational assessment on substituent effect
作者:Vahideh Zadsirjan、Majid M. Heravi、Mahmoud Tajbakhsh、Hossein A. Oskooie、Morteza Shiri、Tayebeh Hosseinnejad
DOI:10.1007/s11164-016-2471-5
日期:2016.7
Hydroarylation of cinnamic acid with different substituted phenols, in the presence of acidic ionic liquid, N-methyl-2-pyrrolidonum hydrosulfate ([H-NMP]HSO4) gave the corresponding dihydrocoumarins in high yields and excellent selectivity. Among these substituted phenols, while methyl phenol afforded the corresponding dihydrocoumarin, nitrophenol under the same reaction conditions diverted the course