- A highly negatively charged γ-Keggin germanodecatungstate efficient for Knoevenagel condensation.
A highly negatively charged γ-Keggin germanodecatungstate efficient for Knoevenagel condensation.
Chemical communications (Cambridge, England) (2012-07-14)
Kosei Sugahara, Toshihiro Kimura, Keigo Kamata, Kazuya Yamaguchi, Noritaka Mizuno
PMID22790486
ABSTRACT
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.
MATERIALS
Product Number
Brand
Product Description
Tetrabutylammonium cyanide, 95%
Tetrabutylammonium hydroxide solution, 53.5-56.5% in H2O
Tetrabutylammonium hydroxide solution, 1.0 M in methanol
Tetrabutylammonium hydroxide solution, technical, ~40% in H2O (~1.5 M)
Tetrabutylammonium bisulfate, puriss., ≥99.0% (T)
Tetrabutylammonium hydroxide solution, 40 wt. % in H2O
Tetrabutylammonium bisulfate, suitable for ion pair chromatography, LiChropur™, ≥99.0%
Supelco
Tetrabutylammonium bisulfate solution, suitable for ion pair chromatography, LiChropur™, concentrate, ampule
Tetrabutylammonium iodide, ≥99.0% (AT)
Tetrabutylammonium bisulfate solution, ~55% in H2O