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

ZUSAMMENFASSUNG

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.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

268100

Sigma-Aldrich

Tetrabutylammoniumphosphat monobasisch -Lösung, 1.0 M in H₂O

216143

Sigma-Aldrich

Tetrabutylammoniumfluorid -Lösung, 1.0 M in THF

86870

Sigma-Aldrich

Tetrabutylammoniumchlorid, ≥97.0% (NT)

178780

Sigma-Aldrich

Tetrabutylammoniumhydroxid -Lösung, 40 wt. % in H₂O

230189

Sigma-Aldrich

Tetrabutylammoniumhydroxid -Lösung, 1.0 M in methanol

140775

Sigma-Aldrich

Tetrabutylammoniumiodid, reagent grade, 98%

155837

Sigma-Aldrich

Tetrabutylammoniumhydrogensulfat, 97%

86854

Supelco

Tetrabutylammoniumhydroxid -Lösung, ~40% in water, suitable for ion chromatography

426288

Sigma-Aldrich

Tetrabutylammoniumbromid, ACS reagent, ≥98.0%

86885

Sigma-Aldrich

Tetrabutylammoniumperchlorat, ≥95.0% (T)

358665

Sigma-Aldrich

Tetrabutylammoniumcyanid, 95%

86868

Sigma-Aldrich

Tetrabutylammoniumbisulfat, puriss., ≥99.0% (T)

86833

Sigma-Aldrich

Tetrabutylammoniumphosphat monobasisch, puriss., 99% (T)

359173

Sigma-Aldrich

Tetrabutylammoniumnitrat, 97%

86890

Sigma-Aldrich

Tetrabutylammoniumiodid, ≥99.0% (AT)

193119

Sigma-Aldrich

Tetrabutylammoniumbromid, ReagentPlus^®, ≥99.0%

651664

Sigma-Aldrich

Tetrabutylammonium-Azid

361399

Sigma-Aldrich

Tetrabutylammoniumfluorid -Lösung, 75 wt. % in H₂O

86853

Supelco

Tetrabutylammoniumbisulfat, suitable for ion pair chromatography, LiChropur^™, ≥99.0%

86893

Supelco

Tetrabutylammoniumperchlorat, for electrochemical analysis, ≥99.0%

86880

Sigma-Aldrich

Tetrabutylammoniumhydroxid -Lösung, technical, ~40% in H₂O (~1.5 M)

86857

Supelco

Tetrabutylammoniumbromid, suitable for ion pair chromatography, LiChropur^™, ≥99.0%

462144

Sigma-Aldrich

Tetrabutylammoniumbromid, 50 wt. % in H₂O

86863

Sigma-Aldrich

Tetrabutylammoniumhydroxid -Lösung, 53.5-56.5% in H₂O

79989

Sigma-Aldrich

Tetrabutylammoniumcyanid, technical, ≥80%

72453

Sigma-Aldrich

Tetrabutylammonium-bisulfat -Lösung, ~55% in H₂O

86852

Supelco

Tetrabutylammoniumchlorid, suitable for ion pair chromatography, LiChropur^™, ≥99.0%

98479

Supelco

Tetrabutylammonium-bisulfat -Lösung, suitable for ion pair chromatography, LiChropur^™, concentrate, ampule

86903

Supelco

Tetrabutylammoniumiodid, suitable for ion pair chromatography, LiChropur^™, ≥99.0%