KHSO<sub>4</sub>-Assisted Michael Addition–Elimination Reactions of Indole with 3-Dimethylamino-1-phenylprop-2-en-1-ones in Water: An Environmentally Friendly Synthesis of Novel 3-Indolylchalcones
作者:A. Satyapati Devi、P. Helissey、R. L. Nongkhlaw、Jai N. Vishwakarma
DOI:10.1080/00397911.2012.658946
日期:2013.6.18
KHSO4-assisted Michael addition-elimination reactions of 2-methylindoles and 1,2-dimethylindoles with 3-dimethylamino-1-phenylprop-2-en-1-ones (2) in water, leading to the formation of 3-(2-methyl-1H-indol-3-yl)-1-arylpropenones (3a-e) and 3-(1,2-dimethy-1H-lindol-3-yl)-1-arylpropenones (3f-j) respectively in good to excellent yields have been reported. However, cyclodehydration of adducts 3a-f to give carbazoles 4 failed to take place under the reaction conditions.
Noncatalytic destruction of 5-acylcomanic acid esters in the presence of 2-methylindoles as a new method for the synthesis of indolylchalcones
作者:Dmitrii L. Obydennov、Ekaterina O. Pan’kina、Vyacheslav Ya. Sosnovskikh
DOI:10.1007/s10593-017-2147-0
日期:2017.8
Ethyl esters of 5-acylcomanic acids reacted with 2-methylindoles in 3:1 propanol–water mixture in the absence of catalyst, resulting in pyrone ring opening and destruction of the molecular framework and leading to trans-indolylchalcones in 52–70% yields.