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Hegedus L.S. In: Abel A.W., Stone F.G.A., and Wilkinson G. (Eds). Comprehensive Organometallic Chemistry II vol. 12 (1995), Pergamon, Oxford
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Hegedus L.S. In: Abel E.W., Stone F.G.A., and Wilkinson G. (Eds). Comprehensive Organometallic Chemistry II vol. 12 (1995), Pergamon, Oxford 549-576
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Hegedus, L.S.1
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37549005415
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Thermal reactions of Fischer carbene complexes with TMS-substituted alkynes only afforded normal Dötz annulation products instead of silyl vinylketenes in refluxing benzene.
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22
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33846442375
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For the recent developments of cyclobutenones in organic synthesis see:
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For the recent developments of cyclobutenones in organic synthesis see:. Harrowven D.C., Pascoe D.D., and Guy I.L. Angew. Chem., Int. Ed. 46 (2007) 425
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4-vinyl ketene complexes isolated from reactions of metal carbene complex with alkyne see:
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13C NMR data consistent with the literature:
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13C NMR data consistent with the literature:. Yamashita A., Schaub R.G., Bach M.K., White G.J., Toy A., et al. J. Med. Chem. 33 (1990) 775
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46
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37549013975
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note
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Contrary to the bulky TIPS group of alkynes used in thermal reactions, the relatively small TMS group of alkynes in photochemical reactions probably could be another factor that would favor the observed different regiochemistry of 9a and 9b.
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