Alcohols, trimethylsilyl ethers and thiols were efficiently converted to their corresponding carbonyl and disulfides compounds using o-xylylenebis (triphenylphosphonium) dibromochromate (XTPPDBC). This reagent can selectively oxidize thiols to disulfides in the presence of alcohols and trimethylsilyl ethers in acetonitrile at room temperature.

The very low basicity and nucleophilicity of the phosphorus donor in phosphinines can be drastically increased by introducing strongly σ-donating Me3Si substituents to aromatic heterocycle. highest gas-phase was found for 2,3,5,6-tetrakis(trimethylsilyl)phosphinine, which is even more basic gas phase than pyridine. This finding led first quantitative synthesis a phosphinine selenide treating re...

Tris(trimethylsilyl)silane (TTMSS) and azobisisobutironitrile (AIBN) promote the intramolecular heteroarylation of arenesulfonamides with pyridyl radicals under thermal conditions. The arenesulfonamides are easily prepared from pyridinium N-2 0pyridylaminide. The heteroarylation process involves pyridyl radical cyclization and ipso substitution. q 2004 Elsevier Ltd. All rights reserved.

(E)-1-aryl-2,4-bis(trimethylsilyl)but-1-en-3-ynes readily undergo protodesilylation and subsequent aerobic, copper-free Sonogashira cross-coupling with aryl halides to form (E)-1,4-diaryl-2-(trimethylsilyl)but-1-en-3-ynes. The proposed one-pot, two-step approach allows access the isomers containing substituents in mutual syn positions. resulting 2-silyl enynes can be further converted by proto-...

Durch Reaktion von Di-w-butylantimonbromid mit Magnesium und Trimethylchlorsilan in Tetrahydrofuran (THF) konnte Herbstmann [1] Di-nbutyl(trimethylsilyl)stibin herstellen. Im Rahmen unserer Untersuchungen zur Synthese von Dialkylund Diaryl(organometall)stibinen [2, 3] wollten wir prüfen, ob sich auf diesem Wege auch Dimethylund Diethyl(trimethylsilyl)stibin herstellen lassen. Bei der Umsetzung ...