On water synthesis of pyran–chromenes via a multicomponent reactions catalyzed by fluorescent t-ZrO2nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (123) ◽  
pp. 101664-101671 ◽  
Author(s):  
Arijit Saha ◽  
Soumen Payra ◽  
Subhash Banerjee
Keyword(s):  
Multicomponent Reactions ◽  
Reusable Catalyst ◽  
Multicomponent Synthesis

Here, we have reported multicomponent synthesis of diverse pyran fused chromenes namely 2-aminochromene, dihydropyrano[3,2-c]chromene, and chromeno[4,3-b]chromene derivatives using fluorescentt-ZrO2nanoparticles as reusable catalyst in water.

One-pot multicomponent synthesis of highly functionalized bio-active pyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives using ZrO2 nanoparticles as a reusable catalyst

2015 ◽  
Vol 17 (5) ◽  
pp. 2859-2866 ◽  
Author(s):  
Arijit Saha ◽  
Soumen Payra ◽  
Subhash Banerjee
Keyword(s):  
Room Temperature ◽  
Zro2 Nanoparticles ◽  
Reusable Catalyst ◽  
Coumarin Derivatives ◽  
Multicomponent Synthesis ◽  
One Pot

Herein, a facile one-pot multicomponent protocol for the synthesis of biologically important pyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives has been demonstrated using ZrO2 nanoparticles as reusable catalyst at room temperature.

scholarly journals Ugi reaction-derived prolyl peptide catalysts grafted on the renewable polymer polyfurfuryl alcohol for applications in heterogeneous enamine catalysis

2019 ◽  
Vol 15 ◽  
pp. 1210-1216 ◽  
Author(s):  
Alexander F de la Torre ◽  
Gabriel S Scatena ◽  
Oscar Valdés ◽  
Daniel G Rivera ◽  
Márcio W Paixão
Keyword(s):  
Multicomponent Reactions ◽  
Supported Catalysts ◽  
Ugi Reaction ◽  
Multicomponent Synthesis ◽  
Polyfurfuryl Alcohol ◽  
Peptide Catalysts ◽  
Asymmetric Michael Addition ◽  
Enamine Catalysis ◽  
Work Supports ◽  
Peptide Catalyst

The multicomponent synthesis of prolyl pseudo-peptide catalysts using the Ugi reaction with furfurylamines or isocyanides is described. The incorporation of such a polymerizable furan handle enabled the subsequent polymerization of the peptide catalyst with furfuryl alcohol, thus rendering polyfurfuryl alcohol-supported catalysts for applications in heterogeneous enamine catalysis. The utilization of the polymer-supported catalysts in both batch and continuous-flow organocatalytic procedures proved moderate catalytic efficacy and enantioselectivity, but excellent diastereoselectivity in the asymmetric Michael addition of n-butanal to β-nitrostyrene that was used as a model reaction. This work supports the potential of multicomponent reactions towards the assembly of catalysts and their simultaneous functionalization for immobilization.

In situ generation and protonation of the isocyanide/acetylene adduct: a powerful catalyst-free strategy for multicomponent synthesis of ketenimines, aza-dienes, and heterocycles

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 97044-97065 ◽  
Author(s):  
Sadegh Rostamnia
Keyword(s):  
Multicomponent Reactions ◽  
Multicomponent Synthesis ◽  
New Class ◽  
Catalyst Free ◽  
In Situ Generation

In addition to isocyanide-based Ugi, Passerini, van Leusen, and Orru multicomponent reactions, a new class of isocyanide/acetylene-based multicomponent reactions, using zwitterionic adducts, have emerged as powerful methods to synthesize biologically interesting molecules.

scholarly journals Solvent-free multicomponent synthesis of 2-arylpyridines using p-sulfonic acid calix[6]arene as a reusable catalyst

2015 ◽  
Vol 18 (4) ◽  
pp. 374-378 ◽  
Author(s):  
Ángel G. Sathicq ◽  
Natália A. Liberto ◽  
Sergio A. Fernándes ◽  
Gustavo P. Romanelli
Keyword(s):  
Sulfonic Acid ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Multicomponent Synthesis

Chiral β3-isocyanopropionates for multicomponent synthesis of peptides and depsipeptides containing a β-amino acid fragment

2018 ◽  
Vol 16 (33) ◽  
pp. 5987-5998 ◽  
Author(s):  
Danil P. Zarezin ◽  
Olga I. Shmatova ◽  
Valentine G. Nenajdenko
Keyword(s):  
Amino Acid ◽  
Multicomponent Reactions ◽  
Short Peptides ◽  
Multicomponent Synthesis ◽  
Acid Moiety ◽  
Amino Acid Fragment ◽  
Acid Fragment ◽  
Amino Acid Moiety ◽  
New Type

Chiral β3-isocyanopropionic acids derivatives is a new type of isocyanides for multicomponent reactions. The use of these isocyanides in Ugi and Passerini reactions allows to prepare short peptides and depsipeptides with β-amino acid moiety in the structure.

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