An iodine/DMSO-catalyzed sequential one-pot approach to 2,4,5-trisubstituted-1<i>H</i>-imidazoles from α-methylene ketones
作者:Janeeka Jayram、Vineet Jeena
DOI:10.1039/c8ra07238h
日期:——
A sequential one-pot approach to 2,4,5-trisubstituted imidazoles has been developed from α-methylene ketones and aldehydes. This methodology employs air-moisture stable reaction conditions and an inexpensive iodine/DMSO system affording a diverse range of known and novel (substrate scope) 2,4,5-trisubstituted imidazoles in moderate to excellent yields. The iodine/DMSO system was extended to the domino
practical aerobic benzylic sp3 C–H oxidation as a key step towards the domino multi-component synthesis of 2,4,5-trisubstituted imidazoles has been reported. This green methodology employs an inexpensive catalytic copper/oxygen system and proceeds under mild reaction conditions. A variety of substituted imidazoles are prepared in moderate to excellent yields from α-methylene ketones using this innovative
Selenium Dioxide Mediated Benzylic sp3 C-H Oxidation in Acetic Acid: Synthesis of Lophine Derivatives from α-Methylene Ketones via a Domino Multicomponent Reaction
作者:Vineet Jeena、Mncedisi Mazibuko
DOI:10.3987/com-17-13769
日期:——
We report a selenium dioxide/acetic acid catalysed one-pot conversion of alpha-methylene ketones to 1,2-diaryldiketones as a key step to successfully access lophine derivatives in a domino multicomponent reaction.