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- W2951229009 abstract "A series of new 1-, 2-, and multi-substituted indenes has been synthesized and characterized. The reaction of indenyl lithium or 4,7-dimethylindenyl lithium with alkenyl bromides yielded a mixture of 1- and 3-allylindene (1), 3-(3-buten-1-yl)indene (2), 3-(4-penten-1-yl)indene (3), 3-allyl-4,7-dimethylindene (4), 3-(3-buten-1-yl)-4,7-dimethylindene (5), as well as 3-(4-penten-1-yl)-4,7-dimethylindene (6). The 2-substituted indenes 2-allylindene (7), 2-(3-buten-1-yl)indene (8), 2-(4-penten-1-yl)indene (9), 2-allyl-4,7-dimethylindene (10), 2-(3-buten-1-yl)-4,7-dimethylindene (11), and 2-(4-penten-1-yl)-4,7-dimethylindene (12) were prepared by PdCl2(DPPF) or NiCl2(DPPE) catalyzed cross-coupling reactions of the appropriate Grignard reagents with 2-bromoindene or 2-bromo-4,7-dimethylindene. Alkenylation of 3-methylindenyl lithium and 2,4,7-trimethylindenyl lithium produced 1-(3-buten-1-yl)-3-methylindene (13) or 1-(3-buten-1-yl)-2,4,7-trimethylindene (14), respectively. The indene derivatives 1–14 react with n-butyl lithium in hexane yielding the corresponding lithium salts 1a–14a. Zirconium tetrachloride reacts with 1a, 2a, 4a–6a and 11a–14a under formation of the corresponding bis(indenyl)zirconium dichloride complexes 1b, 2b, 4b–6b and 11b–14b. All compounds were characterized by elemental analysis, 1H and 13C{1H}-NMR spectroscopy and mass spectrometry, 5b and 12b also by single crystal X-ray structural analysis. 1b, 4b–6b and 11b–13b are active catalysts for the polymerization of ethene and propene." @default.
- W2951229009 created "2019-06-27" @default.
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- W2951229009 date "1999-05-01" @default.
- W2951229009 modified "2023-10-16" @default.
- W2951229009 title "Synthesis and characterization of 1- and 2-(ω-alken-1-yl)indenes, their lithium salts and dichlorozirconium(IV) complexes" @default.
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- W2951229009 doi "https://doi.org/10.1016/s0022-328x(99)00026-1" @default.
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