Transition Metal-Free Iodine-Catalyzed Denitrative C–S Cross-Coupling: An Atypical Route to Access Thiochromane Derivatives
作者:Anuradha Nandy、Govindasamy Sekar
DOI:10.1021/acs.joc.2c00425
日期:2022.6.3
extended for a three-component synthesis of thiochromenes via intermolecular C–S cross-coupling followed by aldol reaction. The reaction proceeds via activation of the keto group of chalcone through a halogenbond complex with iodine/denitrative C–S bond formation with xanthate/sulfa-Michael addition to chalcones. The methodology was also demonstrated for chemoselective reduction of chalcones. The protocol
A Diastereoselective Assembly of Tetralone Derivatives via a Tandem Michael Reaction and <i>ipso</i>-Substitution of the Nitro Group
作者:Nicolai A. Aksenov、Dmitrii A. Aksenov、Daniil D. Ganusenko、Igor A. Kurenkov、Alexander V. Aksenov
DOI:10.1021/acs.joc.3c00134
日期:2023.5.5
A highlydiastereoselective tandem reaction of 2′-nitrochalcones is reported, involving Michael addition and a subsequent ipso-substitution of the nitro group to produce 1-tetralones with two contiguous chiral centers. A related annulation reaction of 2′-nitrochalcones with potassium cyanide affording 1-indanones with a C3-quaternary chiral center is also demonstrated.
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.