1-Sulfopyridinium chloride: Green and expeditious ionic liquid for the one-pot synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent-free conditions

doi:10.1016/J.CCLET.2014.11.030

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1-Sulfopyridinium chloride: Green and expeditious ionic liquid for the one-pot synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent-free conditions

Published Mar 1, 2015 · Ravibabu Velpula, Janardhan Banothu, Rajitha Gali

Chinese Chemical Letters

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Abstract

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1-Sulfopyridinium chloride is an efficient and recyclable ionic liquid for the one-pot synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent-free conditions.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

1-Sulfopyridinium chloride: Green and expeditious ionic liquid for the one-pot synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent-free conditions

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References

Poly(4-vinylpyridinium)hydrogen sulfate: An efficient and recyclable Bronsted acid catalyst for the synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones

Poly(4-vinylpyridinium)hydrogen sulfate is an efficient and recyclable Bronsted acid catalyst for the synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones, offering good yields and shorter reaction times.

Efficient, stable, and reusable Lewis acid–surfactant-combined catalyst: One-pot Biginelli and solvent-free esterification reactions

Cerium(III) trislaurylsulfonate (Ce(LS) 3) is a stable, efficient, and reusable catalyst for one-pot Biginelli and solvent-free esterification reactions, with potential applications in organic transformations.

Silica-bonded N-propyl sulfamic acid as an efficient recyclable catalyst for the synthesis of 3,4-dihydropyrimidin-2-（1H）-ones/thiones under heterogeneous conditions

Silica-bonded N-propyl sulfamic acid (SBNPSA) efficiently catalyzes one-pot three component Biginelli condensation for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones under environmentally friendly conditions.

Potassium phthalimide： An efficient and green organocatalyst for the synthesis of 4-aryl-7-（arylmethylene）-3,4,6,7-tetrahydro-1H- cyclopenta[d]pyrimidin-2（5H）-ones]thiones under solvent-free conditions

Potassium phthalimide is an efficient and green organocatalyst for the synthesis of Biginelli-type compounds under solvent-free conditions, offering simple procedures and no use of hazardous organic solvents.

Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes

The novel ionic liquid 1-sulfopyridinium chloride effectively catalyzes the tandem Knoevenagel-Michael reaction for the synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-

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