Novel One Pot Synthesis of 3-Acetyl-5-hydroxy-2-methylbenzofuran and 3-Acetyl-5-hydroxy-2-methylnaphthofuran and Synthesis of Their Derivatives
作者:Guru S. Gadaginamath、Rajesh R. Kavali、Shashikanth R. Pujar
DOI:10.1081/scc-120021508
日期:2003.1.7
in quantitative yield by adopting the Nenitzescu reaction. Further, these 5-hydroxybenzofuran and 5-hydroxynaphthofuran were converted to their corresponding 5-methoxyl/5-methoxycarbonylmethoxy derivatives.
Probing the Lewis acidity of heavier pnictogen trichlorides
作者:Jobha A Johnson、Ajay Venugopal
DOI:10.1007/s12039-019-1706-6
日期:2019.12
Two β-ketoimine ligands, [O=C(Me)]CH[C(Me)NHAr] (L1, Ar=2,6-diisopropylphenyl) and [(CH2)2N(H)C(Me)CHC(Me)=O}2] (L2) are used to prepare the complexes [(L1)(THF)SbCl3]2 (1), [(L1)(THF)BiCl3]2 (2), [L2SbCl3]2 (3) and [(L2)3(BiCl3)2] (4), which are characterized by multinuclear NMR spectroscopy, elemental analysis and single-crystal X-ray diffraction experiments. Solid-state structural analysis of 1–4
New boronates prepared from 2,4-pentanedione derived ligands of the NO2 and N2O2 type – comparison to the complexes obtained from the corresponding salicylaldehyde derivatives
heterocycle had been reported, it becomes apparent that there may be differences in reactivity when comparing 2,4-pentanedione and salicylaldehydederived ligands. The molecular compositions of the boron complexes prepared from acacenH2 and acacpenH2 are analogous to the corresponding salen and salpen derivatives, however, the presence of two methyl groups in the six-membered chelate rings generates some structural
AbstractNano-SiO2 efficiently catalyzed the synthesis of β-enaminones using direct condensation of various (cyclic and acyclic) β-diketones with aromatic and aliphatic amines undersolvent-freeconditions. This eco-friendly catalyst can be recovered and reused without significant loss of activity. This methodology provides a simple synthetic route to enaminones in excellentyields at roomtemperature. Graphical
The role of a Lewis acid in the Nenitzescu indole synthesis
作者:Valeriya S. Velezheva、Andrey I. Sokolov、Albert G. Kornienko、Konstantin A. Lyssenko、Yulia V. Nelyubina、Ivan A. Godovikov、Alexander S. Peregudov、Andrey F. Mironov
DOI:10.1016/j.tetlet.2008.09.087
日期:2008.12
A highly efficient Lewis acid-catalyzed method for the Nenitzescusynthesis of 5-hydroxyindoles with a range of substituents at N-1 and C-3 and symmetric 5,5′-dihydroxydiindoles has been developed. The amount of the catalyst (10–100 mol %) required depended on the nature of the enaminone component. It has been shown that Lewis acid plays a role in enaminone component activation through an enamine-ZnC12