A highly negatively charged γ-Keggin germanodecatungstate efficient for Knoevenagel condensation.
A tetra-n-butylammonium (TBA) salt of a γ-Keggin -6-charged germanodecatungstate, [γ-H(2)GeW(10)O(36)](6-) (I), could act as an efficient homogeneous catalyst for Knoevenagel condensation of active methylene compounds with carbonyl compounds.
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
Kosei
K
Sugahara
Toshihiro
T
Kimura
Keigo
K
Kamata
Kazuya
K
Yamaguchi
Noritaka
N
Mizuno
D002384:Catalysis; D005857:Germanium / Q000737:chemistry*; D008752:Methylene Chloride / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*
D000644:Quaternary Ammonium Compounds; D017973:Tungsten Compounds; C576641:gamma-keggin-6-charged germanodecatungstate; D005857:Germanium; D008752:Methylene Chloride; C009405:tetrabutylammonium