Recommended Products
vapor density
<1 (vs air)
Quality Level
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
Looking for similar products? Visit Product Comparison Guide
Related Categories
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 Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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’.
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
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)
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service