95-41-0Relevant articles and documents
Catalytic intermolecular Pauson-Khand-type reaction: Strong directing effect of pyridylsilyl and pyrimidylsilyl groups and isolation of Ru complexes relevant to catalytic reaction
Itami, Kenichiro,Mitsudo, Koichi,Fujita, Kazuyoshi,Ohashi, Youichi,Yoshida, Jun-Ichi
, p. 11058 - 11066 (2007/10/03)
Some circumstantial evidence for the directing effect of the 2-pyhdylsilyl group in the Ru-catalyzed intermolecular Pauson-Khand-type reaction (PKR) of alkenyl(2-pyridyl)silane, alkyne, and carbon monoxide has been provided. Most importantly, we have succeeded in isolating several monometallic Ru complexes relevant to the catalytic reaction: Ru(vinylsilane)(CO)3 complexes and ruthenacyclopentene. While the stoichimetric reaction of the Ru(vinylsilane)(CO)3 complex with an alkyne led to the formation of the corresponding cyclopentenone (PKR product) at 100 °C, the ruthenacyclopentene intermediate was quantitatively produced at 50 °C. This complex was also converted to a cyclopentenone upon heating at 100 °C. Moreover, it was also found that the Ru(vinylsilane)(CO)3 complex and ruthenacyclopentene serve as catalysts in intermolecular PKR.
Carbonyl compounds, methods of making the same, and their use as fragrances and fragrance-enhancing additives
-
, (2008/06/13)
Carbonyl compounds derived from the reaction of alkyl cyclopentenols and vinyl ethers are described. The carbonyl compounds described have excellent fragrance properties, and their use as fragrances and/or fragrance-enhancing compounds is also described. Processes for the preparation of the carbonyl compounds are described as well.
Compounds having protected hydroxy groups
-
, (2008/06/13)
The present invention relates to compounds with protected hydroxy groups of formula (I) These compounds are precursors for organoleptic agents, such as fragrances, and masking agents and for antimicrobial agents. When activated, the compounds of formula (I) are cleaved and form one or more organoleptic and/or antimicrobial compounds.
