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0001004656
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0001098565
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85086288287
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note
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- to the solution results in a depression in reaction rate (i.e., the common-ion effect). See ref 9.
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-
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14
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1542756400
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note
-
Compound 1 has a tendency to polymerize in MeOH and EtOH, and as a consequence, the mass balances were only 56 and 72%, respectively, in these two solvents.
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15
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0002589261
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33947441989
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0000121091
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85086288281
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note
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neo) values.
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19
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85086289642
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note
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- and either 1 or 2 by UV proved troublesome because the reactions were over in less than 5 min, and the results were unacceptably erratic.
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20
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0842341771
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21
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1542651093
-
-
note
-
For both 1 and 8, the bulky tert-butyl groups at the ortho position are expected to severely impede coordination of a Lewis acid with the carbonyl oxygen. We suspect that most of the observed changes in chemical shift observed for 8 are more a function of changes in the dielectric constant of the medium, rather than any close association of solvent or counterion with the oxygen.
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22
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0029782488
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