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12. We used two distinct approaches to select the suitable LAs to the experiments. In one of the approaches, because the donor atoms of carbomethoxyquinones are hard Lewis base oxygen atoms, we thought that tighter and more stable complexes are formed between carbonyl oxygens and hard LAs. a) Laszlo, P.; Teston, M. J. Am. Chem Soc. 1990, 112, 8750.
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37049090904
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c) Braddock, D. C.; Brown, J. M.; Guiry, P. J. J. Chem. Soc., Chem. Commun. 1993, 1244) On the other hand, as mentioned earlier enhancement of reactivity of the carbonyl groups can be achieved through a nonchelated or a chelated intermediate. A suitable example in this connection is the investigation of Chen et al.,
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45
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0010575720
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(equation presented)
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13. (equation presented)
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47
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0010538742
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b) PhD thesis, Letavic, M. A. University of Kansas, 1992, Diss. Abstr. Int. B. 1993, 54(4), 1969
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0010608070
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c) PhD thesis, Reddy, J. P. M. University of Kansas, 1991, Diss. Abstr. Int. B 1993, 54(1), 252
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Reddy, J.P.M.1
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49
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0010634302
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(equation presented)
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15. (equation presented)
-
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50
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0029070185
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54
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0010605587
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note
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17. Unidentified polar addition products, which remained on the baseline in t.l.c. analysis.
-
-
-
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55
-
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0010574386
-
-
(equation presented)
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18. (equation presented)
-
-
-
-
56
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0010575582
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unpublished results
-
2 can be used as a catalyst in the reaction between inactivated quinone and long chained alcohols. We found that the catalyst did work also in this case, but only in 10 % yield. (Hormi, O. E. O.; Moilanen, A. M. unpublished results)
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Hormi, O.E.O.1
Moilanen, A.M.2
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57
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0010608330
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note
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19. When the decarbomethoxylation was carried out with 2-carbomethoxy-3-benzyloxyHQ (6f) using the same reaction conditions, only tarry material was produced.
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