An eco-safe approach to benzopyranopyrimidines and 4H-chromenes in ionic liquid at room temperature

Gupta‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Amit Kumar; Kumari, Kumkum; Singh, Neetu; Raghuvanshi, Dushyant Singh; Singh, Krishna Nand

doi:10.1016/j.tetlet.2011.11.116

Cited by 45 publications

(16 citation statements)

References 33 publications

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“…The green applicability of the catalyst was proven by the recycling of the catalyst for up to ve catalytic cycles without considerable decay in its activity. The reported catalysts such as lithium perchlorate (LiOCl 4 ), 201 and ionic liquid [bmim][BF 4 ], 202 for the synthesis of chromeno [2,3- 209 The same catalyst was also explored for the aza-Michael addition of amines to a,b-enones and for the synthesis of N,N 0 -substituted ureas successfully. The target NPs were prepared via the treatment of Fe 3 O 4 @SiO 2 NPs with CPTES, 3-(3-chloropropyl)imidazole and TBD.…”

Section: Fenp-catalyzed Synthesis Of Heterocyclesmentioning

confidence: 99%

A decennary update on applications of metal nanoparticles (MNPs) in the synthesis of nitrogen- and oxygen-containing heterocyclic scaffolds

et al. 2020

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Section: Fenp-catalyzed Synthesis Of Heterocyclesmentioning

confidence: 99%

A decennary update on applications of metal nanoparticles (MNPs) in the synthesis of nitrogen- and oxygen-containing heterocyclic scaffolds

et al. 2020

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“…Nevertheless, malononitrile seems like a versatile counter‐reagent of salicylaldehyde and, with the combination of these two bifunctional molecules, various heterocyclic compounds can be synthesized. In particular, if a suitable nucleophile was added, the multicomponent reactions of salicylaldehyde and malononitrile opened up an avenue to access many complex heterocyclic compounds …”

Section: Benzaldo‐x Bifunctional Building Blocks and Their Heterocyclmentioning

confidence: 99%

Aldo‐X Bifunctional Building Blocks for the Synthesis of Heterocycles

Ravichandiran

Lai

2016

The Chemical Record

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Compounds containing oxygen, nitrogen, or sulfur atoms inside the rings are attracting much attention and interest due to their biological importance. In recent years, several methods for the synthesis of such molecules have been reported by using aldo-X bifunctional building blocks (AXB3 s) as substrates; these are a wide class of organic molecules that contain at least two reactive sites, among them, one aldehyde, acetal, or semiacetal group was involved. Because of the multiple reactivities, AXB3 s are widely used in the one-pot synthesis of biologically important heterocycles. This review summarizes the synthesis of important heterocycles by using AXB3 s as pivotal components in establishing multicomponent reactions, tandem reactions, and so forth. In many cases, the established reaction systems with AXB3 s were characterized by some green properties, such as easy access to the substrate, mild and environmentally benign conditions, and wide scope of the substrate.

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“…Later on, a few more reports appeared describing the synthesis of benzopyranopyrimidine derivatives with a limited substitution pattern via complex multistep reaction procedures . However, one‐pot multicomponent synthetic protocols for such scaffolds have recently been reported based on the use of microwave irradiation or catalysts such as lithium perchlorate and the ionic liquid [Bmim]BF 4 ; despite such sincere attempts to overcome the existing drawbacks, not one of these three procedures is sufficient to attain “green credentials” for synthesizing this core.…”

Section: Designing Organic Transformations At Ambient Conditionsmentioning

confidence: 99%

Design of Organic Transformations at Ambient Conditions: Our Sincere Efforts to the Cause of Green Chemistry Practice

Brahmachari

2015

The Chemical Record

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This account summarizes our recent efforts in designing a good number of important organic transformations leading to the synthesis of biologically relevant compounds at room temperature and pressure. Currently, the concept of green chemistry is globally acclaimed and has already advanced quite significantly to emerge as a distinct branch of chemical sciences. Among the principles of green chemistry, one principle is dedicated to the "design of energy efficiency" - that is, to develop synthetic strategies that require less or the minimum amount of energy to carry out a specific reaction with optimum productivity - and the most effective way to save energy is to develop strategies/protocols that are capable enough to carry out the transformations at ambient temperature! As part of on-going developments in green synthetic strategies, the design of reactions under ambient conditions coupled with other green aspects is, thus, an area of current interest. The concept of developing reaction strategies at room temperature and pressure is now an emerging field of research in organic chemistry and is progressing steadily. This account is aimed to offer an overview of our recent research works directly related to this particular field of interest, and highlights the green chemistry practice leading to carbon-carbon and carbon-heteroatom bond-forming reactions of topical significance. Green synthetic routes to a variety of biologically relevant organic molecules (heterocyclic, heteroaromatic, alicyclic, acyclic, etc.) at room temperature and pressure are discussed.

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An eco-safe approach to benzopyranopyrimidines and 4H-chromenes in ionic liquid at room temperature

Cited by 45 publications

References 33 publications

A decennary update on applications of metal nanoparticles (MNPs) in the synthesis of nitrogen- and oxygen-containing heterocyclic scaffolds

A decennary update on applications of metal nanoparticles (MNPs) in the synthesis of nitrogen- and oxygen-containing heterocyclic scaffolds

Aldo‐X Bifunctional Building Blocks for the Synthesis of Heterocycles

Design of Organic Transformations at Ambient Conditions: Our Sincere Efforts to the Cause of Green Chemistry Practice

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