Process Intensification with Bifunctional Heterogeneous Catalysts: Selective One-Pot Synthesis of 2′-Aminochalcones
摘要:
2'-Aminochalcones of pharmaceutical and commercial interest have been obtained in high yields and selectivities through a one-pot process using a bifunctional heterogeneous catalyst bearing base and metal active sites. This is a physical mixture material formed by a high-surface-area MgO and Pt on TiO2. The process involves as the first step the Claisen-Schmidt condensation between o-nitroacetophenone and benzaldehyde derivatives on the basic catalytic function. This is followed by a chemoselective hydrogenation of the nitro group in the presence of the carbonyl and double-bond carbon carbon groups within the molecule. Using the bifunctional catalyst and the reaction system proposed here, it is possible to produce, under mild reaction conditions and short reaction times, 2'-aminochalcones with higher yields and selectivities than those obtained by conventional multistep methods.
[EN] COMPOUNDS AND METHODS FOR TREATING OR PREVENTING HEART FAILURE<br/>[FR] COMPOSÉS ET MÉTHODES DE TRAITEMENT OU DE PRÉVENTION D'INSUFFISANCE CARDIAQUE
申请人:UNIV DREXEL
公开号:WO2020146636A1
公开(公告)日:2020-07-16
The present invention relates to the discovery of novel compounds that can be used to treat and/or prevent heart failure in a subject. In certain embodiments, the compounds of the invention are sulfide: quinone oxidoreductase (SQOR) inhibitors. In other embodiments, the compounds of the invention increase physiological levels of H2S in the subject. In yet other embodiments, administration of the compounds of the invention treats and/or prevents hypertension, and/or atherosclerosis, and/or pathological cardiac remodeling that leads to heart failure in the subject.
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.
discover novel antibiotics. The diterpene natural pleuromutilin is a prominent candidate for its special mode of action by inhibiting protein synthesis. In this study, a series of novel pleuromutilin derivatives with chalcone moiety was designed and synthesized, and their antibacterial activities were assessed in vitro. As suggested from the results, most of compounds exhibited potent activities against
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