Nickel-catalyzed Carboannulation Reaction of <i>o</i>-Bromobenzyl Zinc Bromide with Unsaturated Compounds
作者:Ruixue Deng、Liangdong Sun、Zhi Li
DOI:10.1021/ol702167t
日期:2007.12.1
A number of indenes have been prepared in good yields by treating o-bromobenzyl zinc bromide 1 with various terminal and internal alkynes in the presence of a nickel catalyst. The nickel-catalyzed carboannulation reaction was successfully extended to the synthesis of indane derivatives by reaction of 1 with acrylates and styrene.
Remote, Diastereoselective Cobalt-Catalyzed Alkene Isomerization–Hydroboration: Access to Stereodefined 1,3-Difunctionalized Indanes
作者:Nadia G. Léonard、W. Neil Palmer、Max R. Friedfeld、Máté J. Bezdek、Paul J. Chirik
DOI:10.1021/acscatal.9b03444
日期:2019.10.4
The remote, diastereoselective hydroboration of 2- and 3-substituted indenes with a 2,2′:6′,2″-terpyridine cobalt alkyl precatalyst is described that maintains high regio- and stereoselectivity independent of the starting position of the alkene. Several 1,2- and 1,3-disubstituted indanyl boronate esters were obtained with exclusive (>20:1 dr) selectivity for the trans diastereomer including synthetically
Indenyl compounds and catalyst components for the polymerization of
申请人:DSM N.V.
公开号:US05646322A1
公开(公告)日:1997-07-08
The invention relates to an indenyl compound of the general formula R'Ind--M--(Cp)Q.sub.k in which the symbols have the following meanings: Ind: an indenyl group R': a substituent, other than hydrogen, to the Ind group, Cp: a cyclopentadienyl group M: a transition metal from group 3, 4, 5 or 6 of the Periodic System of Elements Q: a ligand to M and k is an integer linked to the valence of M. The invention is characterized in that the R' group is bound to the Ind group at the 2-position. The indenyl compound is a catalyst component for the polymerization of olefins. The invention also relates to polymers obtainable with such indenyl compounds.
Unbridged metallocene dichloride complexes with mono-substituted indenyl ligands and their application for the polymerization of propene
作者:Roland Schmidt、Helmut G Alt
DOI:10.1016/s0022-328x(00)00776-2
日期:2001.3
synthesis of unbridged metallocene dichloride complexes of the type Ind′2ZrCl2 (Ind′=2-alkyl- or arylalkyl-substituted indenyl) is described. The complexes are characterized by 1H- and 13C-NMR spectroscopy and mass spectrometry. After activation with methylalumoxane these complexes can be used for propenepolymerization; they produce block copolymers consisting of alternating isotactic and atactic blocks