Effective direct esterification of butanol by eco-friendly Preyssler catalyst, [NaP5W30O110]14−

Bamoharram, Fatemeh F.; Heravi, Majid Μ.; Roshani, Mina; Jahangir, Manouchehr; Gharib, Ali

doi:10.1016/j.molcata.2007.02.034

Cited by 47 publications

(26 citation statements)

References 43 publications

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“…There are number of reports available on synthesis and characterization of mono nickel substituted phosphotungstate, consisting of different salts such as TBA, potassium and Octadecyl trimethylammonium chloride following two step synthesis [17][18][19][20][21][22][23][24][25][26]. A literature survey also shows that only Mansouri group [27], had reported synthesis of Keggin type Cs salt of PW 11 Ni following the same procedure [16] with a modification.…”

Section: Page 5 Of 27mentioning

confidence: 99%

One pot oxidative esterification of aldehyde over recyclable cesium salt of nickel substituted phosphotungstate

Singh

Patel

Prakashan

2015

Applied Catalysis A: General

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Section: Page 5 Of 27mentioning

confidence: 99%

One pot oxidative esterification of aldehyde over recyclable cesium salt of nickel substituted phosphotungstate

Singh

Patel

Prakashan

2015

Applied Catalysis A: General

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“…The effects of various parameters such as catalyst type, reaction times, reaction temperatures, and molar ratio of n-butanol to hydrogen peroxide have been studied. The green catalysts could be easily recovered and recycled with retention of their initial structure and activity[98].A series of eco-friendly solid acid catalysts, including H 14 [NaP 5 W 30 O 110 ], H 14 -P 5 , H 14 [NaP 5 W 29 MoO 110 ], H 14 -P 5 Mo, and silica supported H 14 [NaP 5 W 30O 110 ], H 14 -P 5 /SiO 2 have been used as catalysts for esterification of salicylic acid with aliphatic alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, t-butanol, 1-pentanol, and 2-pentanol) and benzylic…”

mentioning

confidence: 99%

Recent developments in use of heteropolyacids, their salts and polyoxometalates in organic synthesis

Heravi

Sadjadi

2009

JICS

111

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Heteropolyacids, their salts and polyoxometalates have been used as catalysts in wide range of organic reactions such as multi components, oxidation, reductions, electrochemical and photochemical reactions. There have been tremendous and continued efforts to modify the catalytic performance of heteropoly acids such as supporting them on MCM, silica gel, etc. In this review, we have attempted to bring some of new applications of heteropolyacids in organic reactions and recent approaches on modifying them, into focus.

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“…emerged as viable alternatives to conventional materials, as robust, readily available, oxidative stability, biological compatibility, and high catalytic activities in various organic transformations [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Using magnetic nanoparticles Fe3O4 as a reusable catalyst for the synthesis of pyran and pyridine derivatives via one-pot multicomponent reaction

et al. 2015

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In recent years, several methods and developments have been reported for the synthesis of pyran and pyridine [13][14][15][16][17] derivatives; each has its own merits and drawbacks. Many of the standard procedures require long reaction times, harsh reaction conditions, expensive and toxic reagents, solvents, and tedious work-up procedures. Moreover in some cases, a mixture of products is obtained, needing cost-effective column chromatography, naturally resulting in low yields. Heterogeneous catalysis is of supreme importance in many areas of the chemical and energy consuming industries [18,19].Conducting the reactions, using heterogenous catalysts should compensate some of drawbacks observed in previously reported reactions. In this kind of reaction, the catalyst can be separated by filtration. However, it is worthy to mention in spite of several advantages, experienced, practically in using of heterogenous catalysts, due to the nanosized particles used, few limitations to the sustainability are observed [20].To get around these problems, the use of a heterogeneous catalyst which can be separated practically other than filtration is desirable. Magnetite nanoparticles (Fe 3 O 4 ) have attracted much attention in the past decade, due to their unique features, including, low preparation cost, high thermal and mechanical stability, and adaptability for largescale production. In addition, their paramagnetic nature allows their facile and effective separation from the reaction mixture, without using standard filtration, required in separation of heterogeneous catalysts. Magnetite nanoparticles (Fe 3 O 4 ) can be easily separated from reaction mixture by using just an external magnet [21].Thus, in recent years, nano-Fe 3 O 4 [22] has attracted a great attention as heterogeneous catalyst [23] due to its simple handling, easy of recovery with an external magnetic field [24,25]. Magnetic nanoparticles (MNPs) have Abstract An atom-economical, efficient and mild protocol is described for the synthesis of 2-amino-3-cyanopyridine and 2-amino-3-cyano-4H-pyran derivatives in the presence of high surface area Fe 3 O 4 as a highly effective heterogeneous catalyst via one-pot multicomponent cyclocondensation reaction.

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Effective direct esterification of butanol by eco-friendly Preyssler catalyst, [NaP5W30O110]14−

Cited by 47 publications

References 43 publications

One pot oxidative esterification of aldehyde over recyclable cesium salt of nickel substituted phosphotungstate

One pot oxidative esterification of aldehyde over recyclable cesium salt of nickel substituted phosphotungstate

Recent developments in use of heteropolyacids, their salts and polyoxometalates in organic synthesis

Using magnetic nanoparticles Fe3O4 as a reusable catalyst for the synthesis of pyran and pyridine derivatives via one-pot multicomponent reaction

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