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Patel, Sonal M.; Chudasama, Uma; Ganeshpure, Pralhad A.

doi:10.1023/a:1016544213522

Cited by 20 publications

(11 citation statements)

References 5 publications

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“…As shown in table 3, diethylene glycol (1e) gave 1,4-dioxane (3e) in 85% yield, and triethylene glycol (1f ) under these conditions gave 1,4-dioxane (3e) in 89% yield. These were significantly higher yields of cyclic ether 3e from diethylene glycol (1e) and triethylene glycol (1f ) than previously obtained using other catalyst systems [34][35][36][37][38]. Similarly, polyethylene glycol 200 (1g) gave 1,4-dioxane (3e) in an excellent yield of 86% (table 3).…”

Section: Resultsmentioning

confidence: 72%

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Synthesis of cyclic ethers by cyclodehydration of 1, n -diols using heteropoly acids as catalysts

Sun¹,

Huang²,

Li³

et al. 2018

R. Soc. open sci.

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Heteropoly acids were used as catalysts for cyclodehydration of various 1,n-diols. Cyclodehydration of butane-1,4-diol, pentane-1,5-diol and hexane-1,6-diol catalysed by H3PW12O40 gave tetrahydrofuran, tetrahydropyran and oxepane, respectively. Cyclodehydration of diethylene glycol, triethylene glycol, diethylene glycol monomethyl ether and polyethylene glycol 200 catalysed by H3PW12O40 gave 1,4-dioxane. In particular, cyclodehydration of hexane-1,6-diol gave an excellent yield of oxepane (80%). The selectivity exhibited by the H3PW12O40 catalyst was even better than that exhibited by other reported catalyst systems for similar cyclodehydration reactions.

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Section: Resultsmentioning

confidence: 72%

“…Additionally, reports of cyclodehydration of 1,n-diols to cyclic ethers have been published; this is essentially a dehydration reaction between two hydroxy groups to yield an ether (figure 1 ref. [34] ref. [35] ref.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cyclic ethers by cyclodehydration of 1, n -diols using heteropoly acids as catalysts

Sun¹,

Huang²,

Li³

et al. 2018

R. Soc. open sci.

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“…Thus, Patel et al [46,47] referred the variation of the catalytic activity of tetravalent tin phosphate, zirconium phosphate and titanium phosphate on cyclodehydration of 1, n-diols on the basis of their total number of acid sites and of their number of strong acid sites, as well as of their surface area. In contrast, Xia et al have found out that the weaker the acid strength of sulfated metal oxides, the higher their activity in sorbitol dehydration to isosorbide (they used atmospheric pressure and 10% aqueous sorbitol solution) [48].…”

Section: Examplementioning

confidence: 99%

Metal phosphate catalyzed dehydration of sorbitol under hydrothermal conditions

Rusu

Hoelderich

Wyart

et al. 2015

Applied Catalysis B: Environmental

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“…Converting polyoxygenate compounds such as 1,4‐butanediol into furanic compounds was investigated by several researchers over various solid acid catalysts. [ 2,4–7 ] However, the conversion of larger chain alcohols, more representative of sugars, such as hexanediol is less addressed. Yamaguchi and co‐workers [ 8 ] reported the intramolecular dehydration of chiral hexane‐2,5‐diol (2R,5R) or (2S, 5S) to cis‐2,5‐dimethyltetrahydrofuran using high‐temperature liquid water (523 K) and high carbon dioxide pressure.…”

Section: Introductionmentioning

confidence: 99%

Accessibility in Liquid Media: Cyclodehydration of Hexane‐2,5‐Diol for the Evaluation of Layered Catalysts

Zaarour

Fayad

Boullay

et al. 2021

Adv Materials Inter

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In order to establish layered materials as heterogeneous catalysts in the liquid phase, acidic layered materials are evaluated here through the conversion of hexane‐2,5‐diol used as a model reaction. Such polyoxygenate reactant is representative of some of the biomass components and the interactions of the reagent or furan product with the interlayers surface is a key to the understanding of these lamellar materials features. Layered HNbMoO6 catalyst is particularly active and stable for the studied reaction compared to several zeolites and its high activity is obtained without any pre‐activation step prior to reaction. The influence of temperature and water content in the reaction mixture are also studied for this catalyst. The importance of intercalation in the reaction process is specifically evaluated using Raman spectroscopy and powder X‐ray diffraction. On this layered catalyst, the reaction proceeds after intercalation of diol within the interlayer space followed by subsequent cyclodehydration giving rise to 2,5‐dimethyltetrahydrofuran with high selectivity. Comparison with related layered materials such as HNbWO6 or H2W2O7 highlights a distinct behavior both in reactivity and intercalation and emphasizes the role of the accessibility to the active sites.

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Untitled

Cited by 20 publications

References 5 publications

Synthesis of cyclic ethers by cyclodehydration of 1, n -diols using heteropoly acids as catalysts

Synthesis of cyclic ethers by cyclodehydration of 1, n -diols using heteropoly acids as catalysts

Metal phosphate catalyzed dehydration of sorbitol under hydrothermal conditions

Accessibility in Liquid Media: Cyclodehydration of Hexane‐2,5‐Diol for the Evaluation of Layered Catalysts

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