An Efficient Three-Component Synthesis of Pyranoquinoline Derivatives
作者:Sakineh Asghari、Samaneh Ramezani
DOI:10.1002/jhet.1614
日期:2014.1
Pyranoquinolinederivatives have been synthesized via three‐component reaction of 4‐hydroxy‐1‐methyl‐2(1H)‐quinolinone and dialkyl acetylenedicarboxylates in the presence of nucleophiles such as alkyl isocyanides and triphenylphosphine.
An Efficient Multicomponent Reaction Involving the Interception of the Zwitterionic Intermediate between DMAD and Isocyanides with Some Active Methylene Compounds
作者:Vijay Nair、A. U. Vinod、R. Ramesh、Rajeev S. Menon、Luxmi Varma、Saumini Mathew、Angele Chiaroni
DOI:10.3987/com-02-s(m)62
日期:——
The 1:1 zwitterionic intermediate generated from dimethyl acetylenedicarboxylate and isocyanide is intercepted with 2-hydroxy-1,4-naphthoquinone, 4-hydroxycoumarin, 4-hydroxy-1-methylquinolinone, 4-hydroxy-6-methylpyrone, and 1-naphthol in one-pot to give novel pyran annulated heterocyclic systems in good yields.
LiBF<sub>4</sub>integrated into [BMIm]BF<sub>4</sub>: an ionic-liquid metal composite and homogeneous catalyst for efficient synthesis of pyran-annulated heterocycles
The ionic liquid [BMIm]BF4 doped with LiBF4 was found to efficiently catalyze the three‐component reaction between isocyanides, acetylenic esters and enols or phenols at room temperature, leading to rapid synthesis of 2‐aminopyran‐annulated systems in fairly high yields. Efficiency of this catalysis and its benefits in terms of improved yields and reaction times could be ascribed to involvement of