Rh<sup>II</sup><sub>2</sub>-Catalyzed Synthesis of α-, β-, or δ-Carbolines from Aryl Azides
作者:Ashley L. Pumphrey、Huijun Dong、Tom G. Driver
DOI:10.1002/anie.201201788
日期:2012.6.11
isomers: A range of α‐, β‐ and δ‐carbolinium ions are readily available from ortho‐substituted arylazides using a rhodium(II) carboxylate catalyst (see scheme). The carbolinium ions are readily reduced to afford tryptolines or deprotonated to access pyridoindoles. This [RhII2]‐catalyzed CH bond amination was used in the synthesis of (±)‐horsfiline and neocryptolepine. esp=α,α,α′,α′‐ tetramethyl‐1,3
接近所有异构体:使用羧酸铑 (II) 催化剂可从邻位取代芳基叠氮化物中轻松获得一系列 α-、β- 和 δ-咔啉鎓离子(参见方案)。咔啉离子很容易被还原以提供色氨酸或去质子化以获取吡啶并吲哚。这种 [Rh II 2 ]-催化的 C H 键胺化用于合成 (±)-horsfiline 和新隐碱。esp=α,α,α',α'-四甲基-1,3-苯二丙酸酯。
Ambient Temperature Dehydrogenative C(Ar)–H Carbonylative Lactamization of 2-Arylanilines Using DMF as C1-Source
作者:Yong-Ze Chen、Ting-Hui Ding、Qiang-Qiang Li、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.3c00585
日期:2023.4.21
dehydrogenative C–H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases is reported. Solvent DMF acts as the sole carbonyl source in the absence of an oxidant. The irreversible release of hydrogen gas drags this reaction to the stable phenanthridinone products. This work provides a direct conversion of a broad range of 2-arylanilines to various phenanthridinones.
Synthesis and evaluation of imidazole-4,5- and pyrazine-2,3-dicarboxamides targeting dengue and yellow fever virus
作者:Milind Saudi、Joanna Zmurko、Suzanne Kaptein、Jef Rozenski、Johan Neyts、Arthur Van Aerschot
DOI:10.1016/j.ejmech.2014.09.062
日期:2014.11
The results of a high-throughput screening assay using the dengue virus-2 replicon showed that the imidazole 4,5-dicarboxamide (I45DC) derivative (15a) has a high dengue virus inhibitory activity. Based on 15a as a lead compound, a novel class of both disubstituted I45DCs and the resembling pyrazine 2,3-dicarboxamides (P23DC5) were synthesized. Here, we report on their in vitro inhibitory activity against dengue virus (DENV) and yellow fever virus (YFV). Some of these first generation compounds have shown activity against both viruses in the micromolar range. Within this series, compound 15b was observed to display the highest antiviral potency against YFV with an EC50 = 1.85 mu M. In addition, compounds 20a and 20b both potently inhibited replication of DENV (EC50 = 0.93 mu M) in Vero cells. (c) 2014 The Authors. Published by Elsevier Masson SAS.