Cp*Rh<sup>III</sup>
-Catalyzed Directed Amidation of Aldehydes with Anthranils
作者:Suvankar Debbarma、Modhu Sudan Maji
DOI:10.1002/ejoc.201700457
日期:2017.7.7
towards construction of amide C–N bonds under mild conditions through rhodium(III) catalysis has been explored. Previous waste-free amidations were generally limited to the condensation of carboxylic acids and amines. In this report, we directly applied amination of the aldehyde C(sp2)–H bond to extend the scope of amidation reactions. The amination shows a wide substratesscope, and several important
One-Pot Synthesis of Functionalized Carbazoles via a CAN-Catalyzed Multicomponent Process Comprising a C–H Activation Step
作者:Juan F. González、Damiano Rocchi、Tomás Tejero、Pedro Merino、J. Carlos Menéndez
DOI:10.1021/acs.joc.7b01199
日期:2017.7.21
a double annulation process that generates two C–C and two C–N bonds, with water as the only side product. Mechanistically, this transformation has some unusual features that include an intramolecular coupled hydrogenation-dehydrogenation process, the functionalization of a C–H group by direct attack onto a nitrogen function and a CAN-catalyzed reduction via hydride transfer from ethanol. The mechanisms
Synthesis of 2-(1<i>H</i>-Indol-2-yl)acetamides via Brønsted Acid-Assisted Cyclization Cascade
作者:Nicolai A. Aksenov、Dmitrii A. Aksenov、Anton A. Skomorokhov、Lidiya A. Prityko、Alexander V. Aksenov、Georgii D. Griaznov、Michael Rubin
DOI:10.1021/acs.joc.0c01344
日期:2020.10.2
efficient and straightforward Brønsted-acid mediated cascade process was developed, involving cyclization of readily available β-ketonitriles into 2-aminofurans, and their subsequent recyclization into 2-(1H-indol-2-yl)acetamides is developed. This synthetic route opens a new avenue for an expeditious assembly of various isotryptamine derivatives for medicinal chemistry.
Unexpected cyclization of <i>ortho</i>-nitrochalcones into 2-alkylideneindolin-3-ones
作者:Nicolai A. Aksenov、Dmitrii A. Aksenov、Nikolai A. Arutiunov、Daria S. Aksenova、Alexander V. Aksenov、Michael Rubin
DOI:10.1039/d0ra03520c
日期:——
An original, facile, and highly efficient method for the preparation of 2-(3-oxoindolin-2-ylidene)acetonitriles from ortho-nitrochalcones is described. The featured transformation is a triggered Michael addition of the cyanide anion to the chalcone followed by a cascade cyclization mechanistically related to the Baeyer–Drewson reaction.
2-Substituted-4-quinolones 2 and the corresponding 2,3-dihydro-2-substituted-4-quinolones 3 have been obtained by reduction with CO at 170 °C and 30 atm of 2-nitrochalcones 1, catalysed by Ru3(CO)12 with DIAN-Me as co-catalyst in ethanol–water.