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33744811342
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note
-
An advantage of the protection was the increase in solubility of the compounds throughout the synthetic process as well as the prevention of undesired processes.
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30
-
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33744820753
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-
note
-
Compound 4d was not used as a building block. This entry is in the Table to introduce the substituents of compounds 6d, 8d, and 1Od.
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33744804219
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note
-
To obtain 2, 3, and 8, the protection of the phenolic groups is crucial to avoid byproducts during bromination.
-
-
-
-
34
-
-
33744815551
-
-
note
-
Regioselectivity on the bromination of 6 to give 8 was easily checked by the absence of the singlet at 6.7 ppm, characteristic of H-2.
-
-
-
-
35
-
-
33744816433
-
-
note
-
A lower reaction time than that for the less electron-rich analogues or the lower reaction temperature did not improve the results.
-
-
-
-
36
-
-
33744782789
-
-
note
-
In a previous study on the preparation of Lam-D (ref 27), an excess of 6 equiv of boronate were used; however, the reduction of that amount to 3 equiv did not produce a significant change in the reaction yield.
-
-
-
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37
-
-
33744818826
-
-
note
-
1H-NMR analyses evidenced the presence of an equimolecular amount of 1-aryl- and 2-aryl-bromides and. therefore, the absence of regioselectivity.
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38
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Oxidation reactions of 2′-functionalized 3-aryltetrahydro and 3.4-dihydroisoquinolines
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33744824303
-
-
note
-
It was not possible to oxidize scaffold 1, 61, and 71 using this procedure.
-
-
-
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41
-
-
33744829185
-
-
note
-
Both double doublets were assigned by gHSQC to C5"-H. See the gHSQC of 12f in the Supporting Information.
-
-
-
-
42
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33744807678
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-
note
-
Semiempirical method PM3 was used for the energy minimization of each rotamer.
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43
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33744787816
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3 in 16a and 17a.
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45
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33744786467
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8) to give OH.
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