Microwave-enhanced Pd(0)/acetic acid catalyzed allylation reactions of C, N, and O-pronucleophiles with alkynes
作者:Nitin T. Patil、F. Nawaz Khan、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2004.09.099
日期:2004.11
An efficient method for the allylation of C, N, and O-nucleophiles with alkynes under solvent-free conditions and by microwave activation is established. The process can be termed as a real eco-chemical process since no waste elements are produced in the reaction, moreover it is solvent free. This technique can also be used for the allylation of dimethyl methylmalonate, which proves inert under the
Formation of quaternary centres via iron allyl cations. Rapid entry into spirocyclic ring systems
作者:M. Anne Charlton、James R. Green
DOI:10.1139/v97-116
日期:1997.7.1
Ester-substituted allyltetracarbonyliron cations react with cycloalkylidene-type silyl enol ethers, silyl ketene acetals, and β-keto-esters to give 1,6-dicarbonyl compounds containing a newly formed quaternary centre. Selected condensation products are converted by enolate chemistry into spirocyclic [4.4], [4.5], and [4.6] systems. Acyloin and other reductive cyclization reactions are employed to convert
Azulenes. VII. A Novel Rearrangement in the Synthesis of Azulenes
作者:Werner Herz
DOI:10.1021/ja01588a057
日期:1956.4
Singh et al., Journal Of Scientific and Industrial Research, 1958, vol. 17 B, p. 423,429
作者:Singh et al.
DOI:——
日期:——
Formation of a Quaternary Carbon Center through the Pd(0)/PhCOOH-Catalyzed Allylation of Cyclic β-Keto Esters and 1,3-Diketones with Alkynes
作者:Nitin T. Patil、Yoshinori Yamamoto
DOI:10.1021/jo0490144
日期:2004.9.1
Formation of a quaternarycarboncenter through the allylation of β-ketoesters and 1,3-diketones with alkynes is accomplished by the use of Pd(0)/benzoic acid catalyst. Reactions of various cyclic β-ketoesters and 1,3-diketones with alkynes in the presence of Pd2dba3·CHCl3 (5 mol %), PPh3 (40 mol %), and PhCOOH (10 mol %) proceeded at 100 °C in toluene (5 M) to give the corresponding allylation products