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3643105492
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note
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Interestingly, a second, downfield H-4 resonance is also coupled with the vinyl methyl resonance.
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15
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84984086266
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3643143017
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note
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Analogous results were obtained by irradiation of the analogous monoketone, 6β-(dimethylphenylsiloxy)-5β-cholestan-3-one (7), in cyclohexane with 266 nm and 308 nm laser light. The β (24) and a (25) alcohols were isolated in a ratio of 1:4.5. Details may be found in ref 15.
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19
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3643067992
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Doctoral Dissertation, Purdue University, W. Lafayette, IN, Aug
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Jiang, S. A. Doctoral Dissertation, Purdue University, W. Lafayette, IN, Aug 1995.
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Jiang, S.A.1
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Turro, N.J.1
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3643103401
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note
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In fact, some reaction enhancement was observed in the presence of piperylene. This is due to the low conversion conditions under which the quenching studies were run. We have observed that secondary photochemistry destroys the photoproducts.
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25
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0000504186
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Morrison, H.; Pallmer, M.; Loeschen, R.; Pandey, B.; Muthuramu, K.; Maxwell, B. J. Org. Chem. 1986, 51, 4676-4681.
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Maxwell, B.6
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26
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84986437005
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Distance data were obtained by calculations using a Silicon Graphics Personal Iris 4D/35 Computer with MacroModel V3.5X Software: Mohamadi, F.; Richards, N. G. J.; Guida, W. C.; Liskamp, R.; Lipton, M.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W. C. J. Comput. Chem. 1990, 11, 440. MM2* method: Allinger, N. L. J. Am. Chem. Soc. 1977, 99, 8127.
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Caufield, C.6
Chang, G.7
Hendrickson, T.8
Still, W.C.9
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27
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3042988525
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Distance data were obtained by calculations using a Silicon Graphics Personal Iris 4D/35 Computer with MacroModel V3.5X Software: Mohamadi, F.; Richards, N. G. J.; Guida, W. C.; Liskamp, R.; Lipton, M.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W. C. J. Comput. Chem. 1990, 11, 440. MM2* method: Allinger, N. L. J. Am. Chem. Soc. 1977, 99, 8127.
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Allinger, N.L.1
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28
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3643077398
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note
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We find it striking that direct excitation of the C17 carbonyl group with 308 nm light in 33 and 34 also leads to isomerization of the C3 alkene (4.6 and 10% of the product for 33 and 34, respectively; Table 6). Though these results imply intra-TTET from the C17 ketone triplet to C3, such an explanation would be inconsistent with the lack of ISC we have observed in a C17 ketone. Studies of substrates lacking the C6 DPSO group are in progress.
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33845379281
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Kurth, M. J.; O'Brien, M. J.; Hope, H.; Yanuck, M. J. Org. Chem. 1985, 50, 2626-2632. Parish, E. J.; Luo, C.; Parish, S.; Heidepriem, R. W. Synth. Commun. 1992, 22(19), 2839-2847.
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J. Org. Chem.
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Kurth, M.J.1
O'Brien, M.J.2
Hope, H.3
Yanuck, M.4
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0026785214
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Kurth, M. J.; O'Brien, M. J.; Hope, H.; Yanuck, M. J. Org. Chem. 1985, 50, 2626-2632. Parish, E. J.; Luo, C.; Parish, S.; Heidepriem, R. W. Synth. Commun. 1992, 22(19), 2839-2847.
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Synth. Commun.
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Parish, E.J.1
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Heidepriem, R.W.4
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32
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0000390810
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