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The scope of this new transformation was briefly investigated using different o-alkynyl styrenes 1a-h. See the Supporting Information for the synthesis of racemic 1-alkenyl-1H-indenes 2a-g and 1-oxygen-functionalized-1H- indenes 3aa-3hb In addition, we also looked at the behavior of the corresponding terminal alkyne, 2′,2′-dimethyl o-(ethynyl)styrene, though the reaction was sluggish and gave decomposition products
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The scope of this new transformation was briefly investigated using different o-alkynyl styrenes 1a-h. See the Supporting Information for the synthesis of racemic 1-alkenyl-1H-indenes 2a-g and 1-oxygen-functionalized-1H- indenes 3aa-3hb. In addition, we also looked at the behavior of the corresponding terminal alkyne, 2′,2′-dimethyl o-(ethynyl)styrene, though the reaction was sluggish and gave decomposition products.
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see also: L. Charruault, V. Michelet, R. Taras, S. Gladiali, J.-P. Genêt, Chem. Commun. 2004, 850-851, for a conceptually related platinum-catalyzed alcoxycyclization of 1,6-enynes.
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ortho-(Alkynyl)styrenes could be considered in some way as 1,5enynes. As far as we know neither the gold-catalyzed enantioselective cycloisomerization of o-(alkynyl)styrenes neither of 1,5-enynes has been reported. In contrast, gold-catalyzed enantioselective reactions of 1,6-enynes have been described (see references [21a,c,d])
-
ortho-(Alkynyl)styrenes could be considered in some way as 1,5enynes. As far as we know neither the gold-catalyzed enantioselective cycloisomerization of o-(alkynyl)styrenes neither of 1,5-enynes has been reported. In contrast, gold-catalyzed enantioselective reactions of 1,6-enynes have been described (see references [21a,c,d]).
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54
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0005673985
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CCDC 766525 (3ha) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data-request/cif.
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Cambridge Crystallographic Data Centre
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