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27
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33747583083
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note
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max (Ig ε) = 281 (3.76), 270 (sh, 3.83), 267 (3.84), 258 nm (sh, 3.75).
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28
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33747571843
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note
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Turro and co-worker independently found that the photolysis of 1,2-bis(1-pentynyl)cyclopentene as well as of 1,2-bis(1-phenylacetylenyl)-cyclopentene yielded the indane derivatives; see citation [39] in reference [4b].
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29
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0023689095
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0026662154
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K. C. Nicolaou, G. Zuccarello, C. Riemer, V. A. Estevez, W.-M. Dai, J. Am. Chem. Soc. 1992, 114, 7360-7371.
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Dai, W.-M.5
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32
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33747544693
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note
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We confirmed that the thermal reaction of 7 proceeded smoothly at 57 °C and did not give even trace amounts of 9. The enediyne 9 did not undergo cycloaromatization at the same temperature; this reaction did not occur at an appreciable rate until at least 100 °C.
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