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
Expedient, one-pot preparation of fused indoles via CAN-catalyzed three-component domino sequences and their transformation into polyheterocyclic compounds containing pyrrolo[1,2-a]azepine fragments
作者:Padmakar A. Suryavanshi、Vellaisamy Sridharan、J. Carlos Menéndez
DOI:10.1039/c004703a
日期:——
The CAN-catalyzed three-component between reaction between primary amines, β-dicarbonyl compounds and naphthoquinones or 2-bromonaphthoquinones afforded, respectively, 5-hydroxybenzo[g]indoles and benzo[f]indole-4,9-diones, the former of which were transformed into tetracyclic azepino[1,2-a]benzo[g]indole systems through a γ-alkylation/ring-closing metathesis sequence.
这 能够伯胺之间的反应之间催化的三组分, β-二羰基化合物和萘醌或2-溴萘醌分别提供了5-羟基苯并[ g ]吲哚和苯并[ f ]吲哚-4,9-二酮,它们的前者转化为四环氮杂[1,2- a ]苯并[ g ]吲哚 系统通过γ-烷基化/闭环复分解序列。
Synthesis of new adducts and co-ordination complexes of zirconium and titanium containing β-aminoketone ligands. Crystal structures of isostructural adducts MCl4·2PriHNCMeCHCMeO (M = Ti or Zr) and the complex [Zr(PhNCMeCHCMeO)2Cl2]
作者:David Jones、Andrew Roberts、Kingsley Cavell、Wilhelm Keim、Ulli Englert、Brian W. Skelton、Allan H. White
DOI:10.1039/a707422k
日期:——
determinations of the isostructural compounds ZrCl4·2PriHNCMeCHCMeO and TiCl4·2PriHNCMeCHCMeO indicated an octahedral co-ordination environment around the metal with the trans monodentate N–O ligands bound through the oxygen only. Strong intramolecular hydrogen bonding of the hydrogen on the nitrogen with the ligand oxygen is consistent with a ligand immonium enolate structure. An X-ray study of the
MCl 4(M = Zr或Ti)与β-氨基酮HL(R 1 HNCR 2 CHCR 3 O; R 2 = R 3 = Me; R 2 = Me,R 3 = CF 3)反应生成双(配体) )加合物MCl 4 ·2HL(M = Zr,R 1 = Pr i或Ph; R 2 = R 3 = Me;或R 1 = Pr i,R 2 = Me,R 3 = CF 3 ; M = Ti,R 1 = Pr i或CH 2 CH CH 2,R 2 = R 3 = Me)。MCl 4与β-氨基酮配体的碱金属盐反应生成双(配体)配合物[M(R 1 NCMe CHCMe O)2 Cl 2 ](M = Zr,R 1 = Ph,p -ClC 6 H 4,p -MeOC 6 H 4或Pr i; M = Ti,R 1 = Ph或p -MeOC 6 H 4)。同构化合物ZrCl 4 ·2Pr i的晶体结构测定HNCMe
Simple and efficient synthesis of 3-aminopropenones and 3-aminopropenoates catalyzed by copper(II) nitrate trihydrate under solvent-free conditions
作者:Geng-Chen Li
DOI:10.1007/s00706-007-0832-x
日期:2008.7
A simple, efficient and environmentally begin method has been developed for the synthesis of 3-aminopropenones and 3-aminopropenoates through the reaction of 1,3-dicarbonyl compounds with amines in the presence of Cu(NO(3))(2) center dot 3H(2)O under solvent-free conditions.
Efficient Synthesis of Alkyl β-Diketimines
作者:Alexander Z. Bradley、David L. Thorn、Gerald V. Glover
DOI:10.1021/jo801691m
日期:2008.11.7
A general synthesis for the preparation of alkyl N,N'-beta-diketimines has been developed. The method reported here demonstrates the use of dimethyl sulfate for conversion of enaminoketones to beta-diketimines. The reaction can be performed without solvent, providing good yields.