Rhodium-Catalyzed Dehydrogenative Annulation of <i>N</i>-Arylmethanimines with Vinylene Carbonate for Synthesizing Quinolines
作者:Yan Hu、Jiang Nan、Jiacheng Yin、Guanjie Huang、Xin Ren、Yangmin Ma
DOI:10.1021/acs.orglett.1c03231
日期:2021.11.5
Here we report a novel Rh-catalyzed C−H/C−H alkenylation of N-arylmethanimines with vinylenecarbonate acting as a vinylene unit. Forty examples of C3,C4-nonsubstituted quinolines were achieved from commercially available starting materials. This identified process features an exceedingly simple system, a lower loading of catalyst, and the capacity for postfunctionalization with bioactive molecules
Catalyst- and solvent-free efficient access to <i>N</i>-alkylated amines <i>via</i> reductive amination using HBpin
作者:Vipin K. Pandey、Somnath Bauri、Arnab Rit
DOI:10.1039/d0ob00740d
日期:——
conditions for the synthesis of structurallydiverse secondary amines has been uncovered. This one-pot protocol works efficiently at room temperature and is compatible with a wide range of sterically and electronically diversealdehydes and primary amines. Notably, this simple process offers scalability, excellent functional group tolerance, chemoselectivity, and is also effective at the synthesis of biologically
Azetidinimines as a novel series of non-covalent broad-spectrum inhibitors of β-lactamases with submicromolar activities against carbapenemases KPC-2 (class A), NDM-1 (class B) and OXA-48 (class D)
作者:Eugénie Romero、Saoussen Oueslati、Mohamed Benchekroun、Agathe C.A. D’Hollander、Sandrine Ventre、Kamsana Vijayakumar、Corinne Minard、Cynthia Exilie、Linda Tlili、Pascal Retailleau、Agustin Zavala、Eddy Elisée、Edithe Selwa、Laetitia A. Nguyen、Alain Pruvost、Thierry Naas、Bogdan I. Iorga、Robert H. Dodd、Kevin Cariou
DOI:10.1016/j.ejmech.2021.113418
日期:2021.7
inhibit not only the three main clinically-relevant carbapenemases of Ambler classes A (KPC-2), B (NDM-1) and D (OXA-48) with Ki’s below 0.3 μM, but also the cephalosporinase CMY-2 (class C, 86% inhibition at 10 μM). Our results pave the way for the development of a new structurally original family of non-covalent broad-spectrum inhibitors of β-lactamases.
An easy synthesis of diversely functionalized 2H-chromenes and amido amines by an enol-Ugi reaction
作者:Ana G. Neo、Teresa G. Castellano、Carlos F. Marcos
DOI:10.3998/ark.5550190.p009.775
日期:——
The first synthesis of methyl 2-(4-hydroxy-2-oxo-2H-chromen-3-yl)-2-oxoacetate is described. This compound has been successfully used in a multicomponent enol-Ugi condensation with imines and isocyanides affording 4-aminoacyl-coumarin enamines in a highly atom-economic and convergent process. Furthermore, the postcondensation transformation of these adducts allows the straightforward synthesis of both
Modular Synthesis of Stereodefined Benzocyclobutene Derivatives via Sequential Cu- and Pd-Catalysis
作者:Fabien J. T. Talbot、Shibo Zhang、Bishnupada Satpathi、Gareth P. Howell、Gregory J. P. Perry、Giacomo E. M. Crisenza、David J. Procter
DOI:10.1021/acscatal.1c04496
日期:2021.12.3
materials and medicinal chemistry, although general routes for their provision remain underexplored. A modular, divergent, and stereoselective Cu- and Pd-catalyzed assembly/cyclization sequence allows the synthesis of densely functionalized BCBs, from readily accessible imine, allene, and diboron precursors. Preliminary results have identified enantioselective conditions for our protocol and highlighted,
苯并环丁烯 (BCB) 对材料和药物化学的兴趣越来越大,尽管其提供的一般途径仍未得到充分探索。模块化、发散和立体选择性的 Cu 和 Pd 催化的组装/环化序列允许从容易获得的亚胺、丙二烯和二硼前体合成密集功能化的 BCB。初步结果已经确定了我们协议的对映选择性条件,并强调了,例如,它适用于合成含 BCB 的肽。通过实验条件的简单变化或底物修饰,我们的策略扩展到提供二氢吲哚和喹啉衍生物,适合进一步操作。