Application of BU4N+HSO4 − as an Ionic Liquid and Acid Catalyst for Thioacetalization of Aldehydes and Ketones

Hajipour, Abdol R.; Hosseini, Peyman; Ruoho, Arnold E.

doi:10.1080/10426500801967757

Cited by 15 publications

(2 citation statements)

References 40 publications

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“…Since ionic liquids are much more complex solvent systems capable of undergoing many types of interactions, characterizing them with a single polarity term fails to encompass the broad spectrum of types and the magnitude of individual interactions that make each ionic liquid unique. Ionic liquids exhibit multiple behaviors, which explains why many ionic liquids act as polar solvents in organic reactions containing polar molecules and as less polar solvents in the presence of less polar molecules [133][134][135][136][137][138][139].…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid assisted synthesis of six-membered oxygen heterocycles

Kaur

2019

SN Appl. Sci.

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Due to special properties of ionic liquids (ILs) like their wide liquid range, good solvating ability, negligible vapour pressure, non-inflammability, environment friendly medium, high thermal stability, easy recycling and rate promoters etc. they are used in organic synthesis. The investigation for replacement of organic solvents in organic synthesis is a growing area of interest due to increasing environmental issues. Therefore, ILs have attracted the attention of chemists and act as catalyst and reaction medium in organic reaction with high activity. There is no doubt that ILs have become a major subject of study for modern chemistry. In comparison to traditional processes the use of ILs resulted in improved, complimentary or alternative selectivities in organic synthesis. The aim of present review is to focus on the applications of ILs for the synthesis of six-membered oxygen heterocycles (pyrans, chromenes, coumarins and dioxanes). Scheme 8 Synthesis of furans and pyran Scheme 27 Synthesis of 4H-benzo[b]pyrans Scheme 28 Synthesis of biscoumarins Scheme 29 Synthesis of 4-methyl-4,5-diphenyl-1,3-dioxane

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Section: Introductionmentioning

confidence: 99%

Ionic liquid assisted synthesis of six-membered oxygen heterocycles

Kaur

2019

SN Appl. Sci.

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“…Numerous chemical reactions, such as esterification reaction [5][6][7][8][9], cleavages of ethers [10], aldol condensation [11], protection of carbonyls [12][13][14][15][16], Koch carbonylation [17], polymerization [18], hydrogenation, regioselective alkylation and Friedel-Crafts reactions [19][20][21][22], dimerization [23][24], Diels-Alder reactions [25][26], Mannich reaction [27][28], oximation [29], oxidation [30][31][32], Heck reaction [33], Knoevenagel reaction [34][35][36], Henry reactions [37], heterocyclic synthesis [38][39][40][41], cross-coupling reactions and some enzyme reactions can be carried out in ionic liquids.…”

Section: Introductionmentioning

confidence: 99%

Basic ionic liquids. A short review

Hajipour

Rafiee

2009

JICS

174

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Basic ionic liquids as environmental-friendly solvents and catalysts with high activity and selectivity and easily recovered materials were used to replace traditional bases such as KOH, NaOH, K 2 CO 3 , NaHCO 3 , NaOAc, triethylamine, or tetrabutylammonium acetate. Using the traditional bases generally suffered from disadvantages such as waste production, corrosion and environmental problems. Basic ionic liquids offering a new possibility for developing environmentally friendly basic catalysts due to the combination of the advantages of inorganic bases and ionic liquids. They are flexible, nonvolatile, noncorrosive, and immiscible with many organic solvents. Basic ionic liquids (BILs) have been used in base-catalyzed processes such as Michael addition, Markovnikov addition, Knoevenagel condensation, Henry reaction, Mannich reaction, oximation, FeistBenary reaction and etc. In this short review, we wish to present an overview of the types, properties, synthesis and applications of basic ionic liquids.

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