产品名称
Amberlyst ® A21 游离碱, 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
Quality Level
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Legal Information
Amberlyst is a registered trademark of The Dow Chemical Company or an affiliated company of Dow
Application
采用大孔树脂® A21 游离碱制备催化剂。
Features and Benefits
带烷基胺官能团的弱碱性、大网格树脂。
General description
大孔树脂 A21 是一种中性离子交换树脂，固体碱催化醛和丙二腈与各种活性亚甲基化合物的三元反应，合成一系列吡喃环杂环化合物。使用固体碱是通过消除涉及危险有机溶剂的色谱纯化，生成高度绿色的方案，并且易于回收和重复使用催化剂。大孔树脂 A21 用作流化床树脂。流化床反应器允许在流动系统中使用聚合物支撑 (PS) 有机反应的凝胶型微球。1-氧代茚-2-羧酸甲酯与甲基乙烯基酮在甲苯中的 Michael 反应可通过大孔树脂 A21 流化床在 50°C 下获得。
存储类别
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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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