β-unsaturated amides and alkenyl nitriles from readily available propargylic alcohols. The reaction proceeded smoothly under the neutral conditions with hydroxylaminehydrochloride (NH2OH·HCl) as the nitrogen source. The development of these new strategies has significantly extended the application of hydroxylaminehydrochloride to the chemistry of propargylic alcohols. Moreover, both secondary and tertiary alcohols
Reactions of <i>N</i>,3-diarylpropiolamides with arenes under superelectrophilic activation: synthesis of 4,4-diaryl-3,4-dihydroquinolin-2(1<i>H</i>)-ones and their derivatives
作者:Larisa Yu Gurskaya、Diana S Belyanskaya、Dmitry S Ryabukhin、Denis I Nilov、Irina A Boyarskaya、Aleksander V Vasilyev
DOI:10.3762/bjoc.12.93
日期:——
The reaction of 3-aryl-N-(aryl)propiolamides with arenes in TfOH at room temperature for 0.5 h led to 4,4-diaryl-3,4-dihydroquinolin-2-(1H)-ones in yields of 44-98%. The obtained dihydroquinolinones were further transformed into the corresponding N-acyl or N-formyl derivatives. For the latter, the superelectrophilic activation of the N-formyl group by TfOH in the reaction with benzene resulted in the