Synthesis of 6,12-Epiminodibenzo[<i>b</i>,<i>f</i>][1,5]diazocines via an Ytterbium Triflate-Catalyzed, AB<sub>2</sub> Three-Component Reaction
作者:Isravel Muthukrishnan、Muthu Karuppasamy、Subbiah Nagarajan、C. Uma Maheswari、Vittorio Pace、J. Carlos Menéndez、Vellaisamy Sridharan
DOI:10.1021/acs.joc.6b01764
日期:2016.10.21
An efficient and selective procedure for the synthesis of epiminodibenzo[b,f][1,5]diazocines involving a AB2 three-component reaction is developed. Two equivalents of suitably substituted 2-aminoarylaldehydes reacted with arylamines in the presence of Yb(OTf)3 to afford the desired products in high yields. The reaction is highly atom-economic and waste-free, in addition to allowing the generation of
Exploring Synthetic Strategies for 1<i>H</i>‐Indazoles and Their <i>N</i>‐Oxides: Electrochemical Synthesis of 1<i>H</i>‐Indazole <i>N</i>‐Oxides and Their Divergent C−H Functionalizations
作者:Sagar Arepally、Taehoon Kim、Gyeongho Kim、Haesik Yang、Jin Kyoon Park
DOI:10.1002/anie.202303460
日期:2023.6.26
The study reports selective electrochemical synthesis of 1H-indazoles and N-oxides, where electrochemical outcomes were dictated by the cathode material (RVC=reticulated vitreous carbon). The adaptability of 1H-indazole N-oxides for various C−H functionalization reactions was showcased. Furthermore, 1H-indazole N-oxides were utilized to synthesize the pharmaceutical molecules lificiguat and YD (3)
该研究报告了 1 H-吲唑和N-氧化物的选择性电化学合成,其中电化学结果由阴极材料决定(RVC=网状玻璃碳)。展示了1 H -吲唑N -氧化物对各种 C−H 官能化反应的适应性。此外,1 H -吲唑N -氧化物被用于合成药物分子 lificiguat 和 YD (3),各种药物的关键中间体,以及有机发光二极管的前体。
Regioselective Synthesis of Benzo[<i>h</i>][1,6]-naphthyridines and Chromenopyrazinones through Alkyne Cyclization
作者:Emre Hoplamaz、Selbi Keskin、Metin Balci
DOI:10.1002/ejoc.201601661
日期:2017.3.17
An efficient and regioselective method has been developed for the synthesis of benzo[h][1,6]‐naphthyridine and chromenopyrazinone derivatives. Intramolecular Diels–Alder reaction between a triple bond and an azadiene unit gave the desired skeletons.
已开发出一种有效的区域选择性方法,用于合成苯并[ h ] [1,6]-萘啶和色并吡嗪酮衍生物。三键和氮杂二烯单元之间的分子内Diels-Alder反应可得到所需的骨架。
Synthesis of Tricyclic Aromatic Compounds by the Intramolecular Pauson−Khand Reaction Promoted by Molecular Sieves<sup>,</sup><sup>1</sup>
Pauson-Khandreactions are carried out with different substituted aromatic enynes, yielding tricyclic cyclopentenones related to natural products such as chromenes. Enynes are easily obtained in a two-step approximation from the corresponding salicylaldehydes. The reaction is promoted by dissolved TMANO (trimethylamine N-oxide) and/or 4 A molecular sieves. This new way of induction for the Pauson-Khand