Oxidation Strategy for the Synthesis of Regioisomeric Spiroisobenzofuranopyrroles: Facile Entries to Spiro[isobenzofuran-1,2′-pyrrole] and Spiro[isobenzofuran-1,3′-pyrrole] Derivatives
developed to synthesize two kinds of racemic spiroisobenzofuranopyrrole analogues as regioisomers. In the presence of sodiumperiodate, cis-indeno[1,2-b]pyrrol-4(1H)-ones were converted into spiro[isobenzofuran-1,2′-pyrrole] derivatives by a two-step process. In addition, oxidative reactions promoted by lead tetraacetate were demonstrated using cis-indeno[2,1-b]pyrrol-8(1H)-ones as substrates, affording
One-Pot, Three-Component Synthesis of 1,8-Naphthyridine Derivatives from Heterocyclic Ketene Aminals, Malononitrile Dimer, and Aryl Aldehydes
作者:Xusheng Shao、Zhong Li、Feilong Sun、Fengjuan Zhu
DOI:10.1055/s-0034-1378823
日期:——
was developed for the access of multisubstituted 1,8-naphthyridinederivatives through a one-pot, three-component protocol from heterocyclic ketene animals, malononitrile dimer, and aryl aldehydes in high yields. The 1,8-naphthyridines were formed via Knoevenagel condensation, aza–ene reaction, imine–enamine tautomerization, and intramolecularcyclization.
Synthesis of new types of pyrrolo/pyrido[1,2-a][1,3]diazepines based on seven-membered ring HKA via a one-pot three-component reaction
作者:Mohammad Bayat、Monireh Rezaei
DOI:10.1007/s13738-017-1275-x
日期:2018.4
AbstractAn efficient one-pot synthesis of new types of pyrrolo/pyrido[1,2-a][1,3]diazepines by using the seven-membered ring HKA, an activated methylene compound, and either arylglyoxal monohydrates or salicylaldehyde is described. This method has the advantages of mild reaction conditions and absence of catalyst and provides an entry point to pyrrolo/pyrido and diazepine ring structures. Graphical Abstract
摘要描述了一种有效的一锅合成新型吡咯并/吡啶并[1,2- a ] [1,3]二氮杂卓的方法,该方法使用七元环HKA,活化的亚甲基化合物以及芳基乙二醛一水合物或水杨醛。该方法的优点是反应条件温和且没有催化剂,为吡咯并/吡啶并和二氮杂pine环结构提供了切入点。 图形概要
Efficient synthesis of chromenopyridines containing intramolecular hydrogen bonds through a sequential three-component reaction
作者:Abdolali Alizadeh、Fahimeh Bayat、Zhe Zhu
DOI:10.1007/s11164-015-2414-6
日期:2016.6
A one-pot sequentialreaction of 1,1-bis(methylsulfanyl)-2-nitroethene, diamines, and 3‐formylchromones in EtOH has been developed to afford chromenopyridines. The method is operationally simple and the products are obtained in good yields.