Synthesis of silica chemisorbed bis(hydrogensulphato)benzene (SiO2–BHSB) as a new hybrid material and it's utility as an efficient, recyclable catalyst for the green synthesis of bis(indolyl)methanes

Kamble, Vinod T.; Kadam, K. R.; Waghmare, Amit S.; Murade, Vaishali D.

doi:10.1016/j.scp.2020.100314

Cited by 8 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[48] Recently, a number of methodologies have been developed in this field. [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] A generalize scheme for the different processes so far reported in literature are drawn in Scheme 1. But some of these protocols have many drawbacks like use of toxic metal salts or catalytic systems with expensive reagents, photosensitive catalysts, high catalyst loadings, high temperatures, chromatographic purifications, costly catalyst as well as solvent, time consuming during preparation of catalyst, harsh reaction conditions and hazardous solvent.…”

Section: Introductionmentioning

confidence: 99%

Humic acid: A Biodegradable Organocatalyst for Solvent‐free Synthesis of Bis(indolyl)methanes, Bis(pyrazolyl)methanes, Bis‐coumarins and Bis‐lawsones

Mitra

Ghosh

2021

ChemistrySelect

View full text Add to dashboard Cite

Humic acid, a biodegradable, non‐toxic and easily accessible high molecular weight organocatalyst has been explored for the straightforward and environmentally benign approach towards the preparation of diverse array of functionalized bis(indolyl)methanes, bis(pyrazolyl)methanes, bis‐coumarins and bis‐lawsones by the reaction of a vast range of aldehydes with indole, 3‐methyl‐1‐phenyl pyrazolone, 4‐hydroxycoumarin and 2‐hydroxynaphthalene‐1,4‐dione respectively under solvent‐free condition. These protocols proceed without any hazardous solvents, toxic metal catalysts and harsh reaction conditions. In addition, low catalyst loading, good yield and excellent functional group tolerance are the key advantages of these protocols. The used catalyst and solvent‐free approach make this strategy safe to our mother earth. For the first time reusability of humic acid was investigated and found that it can be recycled up to fifth run without any significant loss of its activity at the end of the reaction. Some bioactive molecules such as arundine, trisindoline and vibribdole A were easily synthesized in our lab by utilizing this designed strategy.

show abstract

Section: Introductionmentioning

confidence: 99%

Humic acid: A Biodegradable Organocatalyst for Solvent‐free Synthesis of Bis(indolyl)methanes, Bis(pyrazolyl)methanes, Bis‐coumarins and Bis‐lawsones

Mitra

Ghosh

2021

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…In the last couple of decades more attention was given by scientist on the development of new methods for the synthesis of organic compounds using eco-friendly catalyst. These methods include use of catalyst such as solid catalyst [1], solid supported catalyst [2], reusable catalyst [3], heterogeneous catalyst [4] and bio-catalyst [5]. These catalysts are the best alternative to homogeneous protic acids as it is easy to store, easy to handle, less toxic, eco-friendly with high reactivity and reusability.…”

Section: Introductionmentioning

confidence: 99%

Ferric Hydrogensulfate as an Acidic and Solid Supported Catalyst in Organic Synthesis: A Review

Waghmare

2021

JASR

Self Cite

View full text Add to dashboard Cite

Ferric Hydrogensulfate (FHS) has been used in many organic procedures as a solid acid catalyst. FHS is an inexpensive catalyst and prepared by simple process. It is easy to store, handle, eco-friendly with high reactivity and reusability. It is used in various organic preparations to give corresponding product in excellent yield with high selectivity. FHS supported on silica is known as Silica supported Ferric Hydrogensulfate (SFHS) which is also used as acidic catalyst for various organic transformations. Some important applications of FHS and SFHS in organic reactions are discussed in this review.

show abstract

Heterogenization of Homogeneous Catalyst: An Improved Strategy for an Efficient Synthesis of Highly Substituted 4H-Pyran Scaffolds in Aqueous Based Media

Shringare,

Kadam,

Pandhare

et al. 2023

Catal Lett

View full text Add to dashboard Cite

Synthesis of silica chemisorbed bis(hydrogensulphato)benzene (SiO2–BHSB) as a new hybrid material and it's utility as an efficient, recyclable catalyst for the green synthesis of bis(indolyl)methanes

Cited by 8 publications

References 29 publications

Humic acid: A Biodegradable Organocatalyst for Solvent‐free Synthesis of Bis(indolyl)methanes, Bis(pyrazolyl)methanes, Bis‐coumarins and Bis‐lawsones

Humic acid: A Biodegradable Organocatalyst for Solvent‐free Synthesis of Bis(indolyl)methanes, Bis(pyrazolyl)methanes, Bis‐coumarins and Bis‐lawsones

Ferric Hydrogensulfate as an Acidic and Solid Supported Catalyst in Organic Synthesis: A Review

Heterogenization of Homogeneous Catalyst: An Improved Strategy for an Efficient Synthesis of Highly Substituted 4H-Pyran Scaffolds in Aqueous Based Media

Contact Info

Product

Resources

About