Novel one-pot pseudo four component reaction: expeditious synthesis of functionalized imidazo[1,2-a]pyridines
作者:Haleh Sanaeishoar、Roya Nazarpour、Fouad Mohave
DOI:10.1039/c5ra10891h
日期:——
A new and efficient one-pot synthesis of imidazo[1,2-a] pyridines is described. A C-3 imine substituent was installed on the imidazopyridine framework under mild conditions to form the corresponding products in good to excellent yields.
CuSO<sub>4</sub>–Glucose for in Situ Generation of Controlled Cu(I)–Cu(II) Bicatalysts: Multicomponent Reaction of Heterocyclic Azine and Aldehyde with Alkyne, and Cycloisomerization toward Synthesis of N-Fused Imidazoles
作者:Sankar K. Guchhait、Ajay L. Chandgude、Garima Priyadarshani
DOI:10.1021/jo3003024
日期:2012.5.4
ethanol (nonanhydrous) under open air has been explored. With this catalysis, the multicomponent cascade reaction of A3-coupling of heterocyclic amidine with aldehyde and alkyne, 5-exo-dig cycloisomerization, and prototropic shift has afforded an efficient and eco-friendly synthesis of therapeutically important versatile N-fused imidazoles. Diverse heterocyclic amidines, several of which are known to
A direct synthesis of carbaldehydes through intramoleculardehydrogenativeaminooxygenation has been developed. The process uses a catalytic amount of copper(II) in DMF or DMA under oxygen and does not require additional oxidants (see scheme). Mechanistic studies suggest that the carbonyl oxygen atom of the aldehyde is derived from oxygen through a copper‐mediated oxygen activation process via a peroxy–copper(III)
The present report highlights a magnetic nano-Fe3O4–KHSO4·SiO2 catalyzedsynthesis of imidazo[1,2-a]pyridines. The synthetic strategy adopted is expedient, versatile, and offers good to excellent yields from readily available starting materials.
Monomeric silica supported interaction of
<scp>TOSMIC</scp>
with highly functionalized imines: A green approach to azetidines via
<scp>ABB</scp>
‐type cycloaddition reaction
The reaction of TOSMIC with highlyfunctionalizedimines has been reported. The use of monomericsilica as a catalyst for the reaction has been reported for the first time. The main product of the reported green methodology, formed by the sequential attack of the two TOSMIC units upon the carbon–nitrogen double bond of highlyfunctionalizedimines, has been identified as bis(tosylmethyl)azetidine, a