title: Layered materials with coexisting acidic and basic sites for catalytic one-pot reaction sequences.
abstract: Acidic montmorillonite-immobilized primary amines (H-mont-NH(2)) 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-NH(2), affording the corresponding condensation product in a quantitative yield. The acidity of the H-mont-NH(2) was strongly influenced by the preparation solvent, and the base-catalyzed reactions were enhanced by interlayer acid sites.
authors.affiliation: Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Motokura
authors.forename: Mizuki
authors.initials: M
authors.lastname: Tada
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Iwasawa
mesh_terms: D000143:Acids / Q000737:chemistry*; D000468:Alkalies / Q000737:chemistry*; D000588:Amines / Q000737:chemistry*; D002384:Catalysis
chemical_list: D000143:Acids; D000468:Alkalies; D000588:Amines