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26844579451
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note
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The hydrazone was isolated as an inseparable mixture of isomers.
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33
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26844470653
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note
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The yield of the methoxy-substituted derivative 7d was lower due to some decomposition that was observed during the reaction.
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34
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0029869159
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For similar conditions, see: (a) Fink, D. M.; Palermo, M. G.; Bores, G. M.; Huger, F. P.; Kurys, B. E.; Merriman, M. C.; Olsen, G. E.; Petko, W.; O'Malley, G. J. Bioorg. Med. Chem. Lett. 1996, 6, 625-630.
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Merriman, M.C.6
Olsen, G.E.7
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35
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Skibo, E.B.1
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37
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37049093211
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The mono-fluoro derivative 10d could be removed by column chromatography. (17) (a) Brook, G. M. J. Chem. Soc., Perkin Trans. 1 1983, 4, 821-825.
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Brook, G.M.1
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39
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26844560251
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note
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Protection of the indole nitrogen under non-phase-transfer conditions led to poor product yield due to decomposition.
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40
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0000627594
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(a) Mathre, D. J.; Thompson, A. S.; Douglas, A. W.; Hoogsteen, K.; Carroll, J. D.; Corley, E. G.; Grabowski, E. J. J. J. Org. Chem. 1993, 58, 2880-2888.
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0032541271
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Corey, E.J.1
Helal, C.J.2
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42
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26844433348
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note
-
In general, we found these substrates to be very unreactive under catalytic OAB reducing conditions.
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-
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43
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26844554662
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note
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For example, 14a could be completely converted to racemic 15 upon standing as a solution in MeOH after 24 h.
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44
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0038260520
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For a general review, see: Blaser, H.-U.; Malan, C.; Pugin, B.; Spindler, F.; Steiner, H.; Studer, M. Adv. Synth. Catal. 2003, 345, 103-151.
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Blaser, H.-U.1
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Steiner, H.5
Studer, M.6
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45
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0021512929
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Noyori, R.; Tomino, I.; Tanimoto, Y.; Nishizawa, M. J. Am. Chem. Soc. 1984, 106, 6709-6716.
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Noyori, R.1
Tomino, I.2
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Nishizawa, M.4
-
46
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26844551038
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note
-
Two equivalents of each reagent with respect to starting material was required for complete conversion to product for the Mitsunobu displacement reaction.
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-
-
-
47
-
-
26844431712
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note
-
Diisopropylazodicarboxylate (DIAD) could be used instead of DEAD with little affect on the reaction outcome.
-
-
-
-
48
-
-
26844445787
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note
-
The addition of DEAD is exothermic and can result in a 20 °C temperature change during uncontrolled reagent addition.
-
-
-
-
49
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26844458487
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note
-
This substrate (17f) is extremely sensitive and rapidly decomposes in the presence of acid.
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