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Supelco

Amberlyst® A21 Ion Exchange Resin

free base, 16-50 mesh

Synonym(s):

weak anion exhange resin (DMA)

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About This Item

MDL number:
MFCD00145842
UNSPSC Code:
23151817
NACRES:
SB.52

product name

Amberlyst® A21 free base, free base

vapor density

<1 (vs air)

vapor pressure

17 mmHg ( 20 °C)

form

beads

autoignition temp.

800 °F

moisture

56-62%

technique(s)

LPLC: suitable

matrix

styrene divinylbenzene (macroporous)

matrix active group

dimethylamino

particle size

22-30 mesh
490-690 μm

capacity

1.3 meq/mL by wetted bed volume

separation technique

anion exchange

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General description

Amberlyst A21 is a neutral ion-exchange resin and a solid base which catalyses three-component reaction of aldehyde and malononitrile with various active methylene compounds to synthesize a range of pyran annulated heterocycles. Use of the solid base is to generate a highly green protocol by eliminating chromatographic purification involving hazardous organic solvents, and for easy recovery and reusability of the catalyst. Amberlyst A21 is used as a fluid bed resin. Fluid bed reactor allows gel-type beads, of polymer-supported (PS) organic reactions, to be used in a flow system. The Michael reaction between methyl 1-oxoindan-2-carboxylate and methyl vinyl ketone in toluene can be attained through a fluid bed of Amberlyst A21 at 50°C.

Application

Amberlyst® A21 free base was used in catalyst preparation.

Features and Benefits

Weakly basic, macroreticular resin with alkyl amine functionality.

Legal Information

Amberlyst is a registered trademark of The Dow Chemical Company or an affiliated company of Dow

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Frederic Bonfils et al.
Organic & biomolecular chemistry, 4(3), 493-497 (2006-02-01)
The Michael reaction between methyl 1-oxoindan-2-carboxylate and methyl vinyl ketone was achieved successfully by pumping solutions of the reactants in toluene through a fluid bed of Amberlyst A21 at 50 degrees C. The use of a fluid bed reactor is
Amberlyst A21: A reusable solid catalyst for green synthesis of pyran annulated heterocycles at room temperature.
Bihani, Manisha, et al.
Comptes Rendus Chimie, 16, 419-426 (2013)
Transformation of Biomass Products into Fine Chemicals Catalyzed by Solid Lewis-and Br?nsted-acids.
Corma, Avelino, Michael Renz, and Manuel Susarte.
Topics in Catalysis, 52, 1182-1189 (2009)

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