Layered Materials with Coexisting Acidic and Basic Sites for Catalytic One-Pot Reaction Sequences
Layered Materials with Coexisting Acidic and Basic Sites for Catalytic One-Pot Reaction Sequences
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DOI：
10.1021/ja9012003
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发表时间：
2009-06-17
影响因子：
15
通讯作者：
Iwasawa, Yasuhiro
中科院分区：
文献类型：
--
作者：
Motokura, Ken;Tada, Mizuki;Iwasawa, Yasuhiro
酸性蒙脱石-固定化伯胺（H-mont-NH2）是一锅反应序列中较好的酸碱双功能催化剂，是首次发现具有共存酸的材料。碱位对酸碱反应有活性。例如，h -月- nh2的串联脱醛- knoevenagel缩合反应成功进行，得到了相应的缩合产物。制备溶剂对h - month - nh2的酸度有较大影响，层间酸位对碱催化反应有促进作用。
Acidic montmorillonite-immobilized primary amines (H-mont-NH2) were found to be excellent acid-base bifunctional catalysts for one-pot reaction sequences, which are the first materials with coexisting acid. and base sites active for acid-base tamdem reactions.: For example, tandem deacetalization-Knoevenagel condensation proceeded successfully with the H-mont-NH2, affording the, corresponding condensation product in a. quantitative yield. The acidity of the H-mont-NH2 was strongly influenced by the preparation solvent, and the base-catalyzed reaction's were enhanced by interlayer acid sites.