Recations of cationic (η6-chloroarene) complexes of iron and ruthenium with some O-silyl and C-silyl compounds
摘要:
The introduction of an alkylcarbonyl side chain into the aromatic ring of some chloro-substituted benzenes has been achieved under mild conditions by the Yanovsky-type reaction of (eta-6-chloroarene) (eta-5-cyclopentadienyl) cationic complexes of iron or ruthenium with silyl enol ethers. An ester side chain has been introduced similarly using ethyl trimethylsilylacetate. The resulting (eta-5-chlorocyclohexadienyl) (eta-5-cyclopentadienyl) adducts derived from the ruthenium salts are more stable than their iron analogues. Treatment of the neutral ruthenium adducts with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone gives moderate yields of the [eta-6-(substituted chloroarene)(eta-5-Cp)]Ru+ PF6- salt, together with the decomplexed substituted chloroarene.
Alpha,beta-unsaturated esters and acids by stereoselective dehydration
申请人:Deng Xiaohu
公开号:US20060004195A1
公开(公告)日:2006-01-05
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators which have the general formula:
wherein Ar is an aromatic or heteroaromatic group, X is a hydrocarbon linker, Y is a bond or hydrocarbon linker and R
1
, R
2
, R
3
, R
4
and R
5
are certain organic substituents, methods for making the same, and stereoselective dehydration methods for generally making α,β-unsaturated esters, acids and their derivatives.
[EN] CCK-1 RECEPTOR MODULATORS<br/>[FR] MODULATEURS DU RECEPTEUR DE CCK-1
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2004007463A1
公开(公告)日:2004-01-22
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators.
本发明提供了一些基于吡唑的CCK-1受体调节剂。
Amido complexes of vanadium for olefin polymerization
申请人:Arndt-Rosenau Michael
公开号:US20050282982A1
公开(公告)日:2005-12-22
The present invention relates to compounds containing vanadium in the oxidation state +III or +IV and one or more amido groups, a process for preparing these compounds, the use of the compounds of the invention for preparing a catalyst composition, a process for preparing the catalyst composition and also a process for preparing homopolymers and/or copolymers using the catalyst composition.
Catalyst compositions useful for the polymerization or oligomerization of olefins are disclosed. Certain of the catalyst compositions comprise N-pyrrolyl substituted nitrogen donors. Also disclosed are processes for the polymerization or oligomerization of olefins using the catalyst compositions.