[EN] CATALYST COMPLEXES WITH CARBENE LIGAND AND METHOD FOR MAKING SAME AND USE IN METATHESIS REACTION [FR] COMPLEXES DE CATALYSEURS AVEC UN LIGAND CARBÈNE, LEUR PROCÉDÉ DE FABRICATION ET LEUR UTILISATION DANS UNE RÉACTION DE MÉTATHÈSE
[EN] CATALYST COMPLEXES WITH CARBENE LIGAND AND METHOD FOR MAKING SAME AND USE IN METATHESIS REACTION [FR] COMPLEXES DE CATALYSEURS AVEC UN LIGAND CARBÈNE, LEUR PROCÉDÉ DE FABRICATION ET LEUR UTILISATION DANS UNE RÉACTION DE MÉTATHÈSE
Convenient and Highly Efficient Routes to 2
<i>H</i>
‐Chromene and 4‐Chromanone Derivatives: Iodine‐Promoted and
<i>p</i>
‐Toluenesulfonic Acid Catalyzed Cascade Cyclizations of Propynols
A convenient strategy is presented for the easy preparation of a series of 2H‐chromenes under mild conditions through iodocyclization of readily accessible propynols. In addition, various 4‐chromanones can be synthesized through a p‐toluenesulfonicacidcatalyzedcascadecyclization with high efficiency (yields up to 99 %). Our developed reaction systems are proven to have good functional‐group applicability
CATALYST COMPLEXES WITH CARBENE LIGAND AND METHOD FOR MAKING SAME AND USE IN METATHESIS REACTION
申请人:GUANG MING INNOVATION COMPANY (WUHAN)
公开号:US20150367338A1
公开(公告)日:2015-12-24
This invention relates to catalyst compounds and the synthesis and applications useful in olefin metathesis reactions. The catalyst compounds of the invention are represented by the formula (I): wherein M is a Group 8 metal; X
1
and X
2
are anionic ligands; L
1
and L
2
are neutral two electron donor ligands. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), process to make α-olefins from fatty acid ester, e.g. methyl oleate.
Catalyst complexes with carbene ligand and method for making same and use in metathesis reaction
申请人:GUANG MING INNOVATION COMPANY (WUHAN)
公开号:US10159966B2
公开(公告)日:2018-12-25
This invention relates to catalyst compounds and the synthesis and applications useful in olefin metathesis reactions. The catalyst compounds of the invention are represented by the formula (I): wherein M is a Group 8 metal; X1 and X2 are anionic ligands; L1 and L2 are neutral two electron donor ligands. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), process to make α-olefins from fatty acid ester, e.g. methyl oleate.
BF<sub>3</sub>·Et<sub>2</sub>O-Promoted Cleavage of the C<sub>sp</sub>–C<sub>sp2</sub> Bond of 2-Propynolphenols/Anilines: Route to C2-Alkenylated Benzoxazoles and Benzimidazoles
A novel BF3 center dot Et2O-promoted tandem reaction of easily prepared 2-propynolphenols/anilines and trimethylsilyl azide is developed to give C2-alkenylated benzoxazoles and benzimidazoles in moderate to good yields. Most reactions could be accomplished in 30 min at room temperature. This tandem process involves a C-sp-C-sp2 bond cleavage and a C-N bond formation. Moreover, both tertiary and secondary propargylic alcohols with diverse functional groups were tolerated under the mild conditions.
(BENZOFURAN)NAPHTHOPYRANS, THE COMPOSITIONS AND (CO)POLYMER MATRICES CONTAINING THEM