70608-29-6Relevant academic research and scientific papers
Palladium-Catalyzed Decarboxylative ortho -Amidation of Indole-3-carboxylic Acids with Isothiocyanates Using Carboxyl as a Deciduous Directing Group
Tulichala, R.N. Prasad,Shankar, Mallepalli,Swamy, K.C. Kumara
, p. 4375 - 4383 (2018/04/26)
Palladium-catalyzed ortho-amidation of indole-3-carboxylic acids with isothiocyanates by using the deciduous directing group nature of carboxyl functionality to afford indole-2-amides is demonstrated. Both C-H functionalization and decarboxylation took place in one pot, and hence, this carboxyl group served as a unique, deciduous (or traceless) directing group. This reaction offers a broad substrate scope as demonstrated for several other heterocyclic carboxylic acids like chromene-3-carboxylic acid, imidazo[1,2-a]pyridine-2-carboxylic acid, benzofuran-2-carboxylic acid, pyrrole-2-carboxylic acid, and thiophene-2-carboxylic acid. In the reaction using 2-naphthoic acid, of the two possible isomers, only one isomer of the amide was exclusively formed. The indole-2-amide product underwent palladium-catalyzed C-H functionalization to afford the diindole-fused 2-pyridones by combining two molecules of the indole moiety, with the elimination of an amide group from one of them, attached at the C3-position for the C-C/C-N bond formation. The structures of key products are confirmed by X-ray crystallography.
Facile oxidation of electron-poor benzo[b]thiophenes to the corresponding sulfones with an aqueous solution of H2O2 and P 2O5
Antonow, Dyeison,Marrafa, Teresa,Dawood, Irfaan,Ahmed, Tauheed,Haque, Mohammad R.,Thurston, David E.,Zinzalla, Giovanna
supporting information; experimental part, p. 2289 - 2291 (2010/07/08)
A facile oxidation for the clean conversion of benzo[b]thiophenes to their corresponding sulfones is described employing an aqueous solution of H 2O2 and P2O5; the solution can be prepared and stored on a multi-
