Synthesis and Application of Nano Vanadium‐Oxo Pyridiniumporphyrazinato Sulfonic Acid for Synthesizing Pyrazole and Dihydropyrano^[2,3]pyrazole Derivatives

Abstract

In this study, we presented a description of designing and synthesizing an original nano‐N‐sulfonated (‐SO3H) phthalocyanine molten salt (vanadium‐oxo pyridiniumporphyrazinato sulfonic acid) [VO(TPPASO3H)]Cl as a recyclable and efficient heterogeneous catalyst with thermal stability for synthesizing pyrazole and dihydropyrano[2,3]pyrazole derivatives. After recycling and reapplying five times, this catalyst indicated no significant decrease in the catalytic activity.

Copper‐Decorated Magnetite Polydopamine Composite (Fe3O4@PDA): An Effective and Durable Heterogeneous Catalyst for Pyranopyrazole Synthesis

“…In addition to being non‐toxic and cheap, this catalyst has the advantage of its stability, which allows it to be reused up to 6 times in the reaction, and also increases the efficiency of the reaction tremendously with a smaller amount [52] . The amount of TON and TOF is better than other catalysts, which shows its effectiveness [53] . Another advantage of this catalyst is the reaction solvent, which easily reacts in the water environment, which is its green advantage [54] .…”

“…[52] The amount of TON and TOF is better than other catalysts, which shows its effectiveness. [53] Another advantage of this catalyst is the reaction solvent, which easily reacts in the water environment, which is its green advantage. [54] As shown in Table 3, in comparison with the previous reports, a better yield of the products, higher TOF and milder reaction conditions has been obtained.…”

Synthesis and Characterization of a New Zwitterionic Phthalocyanine for Efficient Synthesis of Polyhydroquinoline and Chromene Derivatives

“…They can be used as cognitive enhancers for the treatment of neurodegenerative diseases, including Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease, Parkinson's disease, AIDS associated dementia, and Down's syndrome, as well as for the treatment of schizophrenia and myoclonus. [24][25][26][27][28] Building upon our earlier investigations, [29][30][31][32][33][34][35][36] this study introduces a new catalyst for the synthesis of polyhydroquinoline and chromene derivatives, specifically the vanadiumoxotetrapyridinoporphyrazine zwitterionic catalyst [VO-(TPPACH 2 CO 2 H)]Cl, which has been modified with acetic acid (Figure 1). This catalyst exhibits dual functionality, possessing both Lewis and Brønsted acid properties within its molecular structure.…”

“…Building upon our earlier investigations, [29–36] this study introduces a new catalyst for the synthesis of polyhydroquinoline and chromene derivatives, specifically the vanadium‐oxotetrapyridinoporphyrazine zwitterionic catalyst [VO(TPPACH 2 CO 2 H)]Cl, which has been modified with acetic acid (Figure 1). This catalyst exhibits dual functionality, possessing both Lewis and Brønsted acid properties within its molecular structure.…”