functionalized N-amino-3-nitrile-indole derivatives are obtained via an intramolecular hetero-cyclization of 2-aryl-3-substituted hydrazono-alkylnitriles using FeBr3 as a single electron oxidant. This approach allows the N-moiety on the side-chain to be annulated to the benzene ring during the final synthetic step via direct oxidative aromatic C–N bond formation.
Amine Directed Pd(II)-Catalyzed C–H Activation-Intramolecular Amination of <i>N</i>-Het(aryl)/Acyl Enaminonitriles and Enaminones: An Approach towards Multisubstituted Indoles and Heterofused Pyrroles
作者:Somaraju Yugandar、Saidulu Konda、Hiriyakkanavar Ila
DOI:10.1021/acs.joc.5b02902
日期:2016.3.4
of either palladium acetate/cupric acetate catalytic system under oxygen atmosphere or palladium acetate/silver carbonate in the presence of pivalic acid as additive. The method is compatible with a diverse range of substituents on the aryl ring as well as at the 2- and 3-positions of the indole ring. The versatility of this method was further demonstrated by elaborating it for the synthesis of heterofused
通过分子内氧化C–H活化胺化现有的2-(杂)芳基-3-(杂)芳基/烷基-3-(杂)芳基/酰基氨基丙烯腈/烯胺酮前体,开发了一种多取代吲哚的有效途径。在氧气气氛下存在乙酸钯/乙酸铜催化体系,或在新戊酸作为添加剂的情况下存在乙酸钯/碳酸银。该方法与芳基环以及吲哚环的2-和3-位上的各种取代基兼容。详细说明了该方法的多功能性,可用于合成杂稠稠合的吡咯,如噻吩并[2,3- b ]吡咯,噻吩并[3,2- b ]吡咯,吡咯并[2,3- b ]吲哚和pyrrolo [2,3-b ]吡啶,收率高。已经提出了形成这些吲哚的可能机理。
Enantioselective Construction of Aryl-Substituted All-Carbon Quaternary Stereocenters by Using Tertiary Amine-Thiourea-Catalyzed Michael Additions
A catalytic enantioselective synthetic strategy for the aryl-substituted all-carbon quaternary stereocenters of bioactive hydrodibenzofuran alkaloids was achieved by the Michael addition reaction of α-cyano ketones and acrylates using a chiral tertiary amine–thiourea catalyst. This method can tolerate steric bulkiness and multiple functional groups, and 32 Michael adducts were prepared in good to excellent
<i>N</i>-Acetyl-3-aminopyrazoles block the non-canonical NF-kB cascade by selectively inhibiting NIK
作者:Agnese C. Pippione、Stefano Sainas、Antonella Federico、Elisa Lupino、Marco Piccinini、Michael Kubbutat、Jean-Marie Contreras、Christophe Morice、Alessandro Barge、Alex Ducime、Donatella Boschi、Salam Al-Karadaghi、Marco L. Lolli
DOI:10.1039/c8md00068a
日期:——
Resulting from hit-to-lead optimization, the aminopyrazole3ais a NIK inhibitor selective over 44 kinases.
由于击中导向优化,氨基吡唑3a是一种选择性超过44种激酶的NIK抑制剂。
An expeditious method to synthesize difluoroboron complexes of β-keto amides from β-keto nitriles and BF<sub>3</sub>·OEt<sub>2</sub>
作者:Chuangchuang Xu、Jiaxi Xu
DOI:10.1039/c7ob01356f
日期:——
synthesize difluoroboron complexes of β-keto amides has been developed fromβ-ketonitriles and BF3·OEt2. BF3·OEt2 serves as both a BF2 source and a Lewis acid catalyst in the synthetic strategy. The formation mechanism of the difluoroboron complexes fromβ-ketonitriles and BF3·OEt2 was proposed. The difluoroboron complexes can be further converted into β-keto amides by treatment with sodium acetate