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Climent, María J.; Corma, Avelino; Guil-López, R.; Iborra, Sara; Primo, Jaime

doi:10.1023/a:1019075227734

Cited by 92 publications

(96 citation statements)

References 22 publications

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“…Synthetic hydrotalcites, of general formula [Mg 8-x Al x (OH) 16 (CO 3 ) x/2 ]nH 2 O are hydrated aluminum-magnesium hydroxides with a lamellar structure in which the excess positive charge is compensated by carbonate anions in the interlamellar space [20,21]. Calcination transforms hydrotalcites, via dehydroxylation and decarbonation, into strongly basic mixed magnesium-aluminium oxides that are useful solid-base catalysts for e.g., aldol [22], Knoevenagel [23,24], and Claisen-Schmidt condensations [24] and epoxidation of electrophilic olefins with H 2 O 2 [25].…”

Section: Catalysis With Solid Acids and Basesmentioning

confidence: 99%

Atom efficiency and catalysis in organic synthesis

Sheldon

2000

Pure and Applied Chemistry

723

322

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Abstract:The key to waste minimization in fine chemicals manufacture is the widespread substitution of classical organic syntheses employing stoichiometric amounts of inorganic reagents with cleaner, catalytic alternatives. The E factors (by waste per kg product) of chemical processes increase dramatically on going downstream from bulk to fine chemicals and pharmaceuticals, mainly owing to the use of "stoichiometric" methods. The concept of atom efficiency is a useful tool for rapid evaluation of the amount of waste generated by alternative processes. The general theme of atom-efficient, catalytic processes is illustrated with industrially relevant examples. These include catalysis by solid acids and bases, catalytic reductions and oxidations, catalytic C-C bond formation, asymmetric catalysis, biocatalysis, and catalysis in novel media (aqueous and fluorous biphasic systems, supercritical fluids, and ionic liquids).

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Section: Catalysis With Solid Acids and Basesmentioning

confidence: 99%

Atom efficiency and catalysis in organic synthesis

Sheldon

2000

Pure and Applied Chemistry

723

322

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“…For this reaction, the acid-base pairs work in a concerted way to activate simultaneously the two reactants, as was previously shown with other inorganic and organic catalysts with acid-base pairs. [15][16][17][18] . Similarly, Wu et al 13 prepared a lanthanide MOF containing Lewis acid Tb 3+ and Lewis base triphenylamine sites, and used it for Knoevenagel an cyanosylalation reactions.…”

Section: Introductionmentioning

confidence: 99%

MOFs as multifunctional catalysts: One-pot synthesis of menthol from citronellal over a bifunctional MIL-101 catalyst

2012

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“…Claisen-Schmidt condensation [18][19][20][21][22][23] of chalcones by conventional method involves addition of equimolar quantities (0.001 mol) of 2-acetyl-5-chloro-thiophene and respective aldehydes (0.001 mol) [5]. …”

Section: Conventional Methodsmentioning

confidence: 99%