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For aerobic electron transfer-based oxidations developed by others see: (a) Byström, S. E.; Larsson, E. M.; Åkermark, B. J. Org. Chem. 1990, 55, 5674. (b) Yokota, T.; Sakurai, Y.; Sakaguchi, S.; Ishii, Y. Tetrahedron Lett. 1997, 38, 3923-3926.
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Byström, S.E.1
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Åkermark, B.3
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14
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For aerobic electron transfer-based oxidations developed by others see: (a) Byström, S. E.; Larsson, E. M.; Åkermark, B. J. Org. Chem. 1990, 55, 5674. (b) Yokota, T.; Sakurai, Y.; Sakaguchi, S.; Ishii, Y. Tetrahedron Lett. 1997, 38, 3923-3926.
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Yokota, T.1
Sakurai, Y.2
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(a) Wai, J. S. M.; Markó, I.; Svendsen, J. S.; Finn, M. G.; Jacobsen, E. N.; Sharpless, K. B. J. Am. Chem. Soc. 1989, 111, 1123.
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(b) Sharpless, K. B.; Amberg, W.; Bennani, Y. L.; Crispino, G. A.; Hartung, J.; Jeong, K. S.; Kwong, H.-L.; Morikawa, K.; Wang, Z.-M.; Xu, D.; Zhang, X.-L. J. Org. Chem. 1992, 57, 2768.
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24
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0006079242
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2 as the terminal oxidant: (a) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1936, 58, 1302-1305. (b) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1937, 59, 2345-2347. (c) Milas, N. A.; Sussman, S.; Mason, H. S. J. Am. Chem. Soc. 1939, 61, 1844-1847. (d) Milas, N. A.; Trepagnier, J. H.; Nolan, J. T.; Iliopulos, M. I. J. Am. Chem. Soc. 1959, 81, 4730-4733.
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Milas, N.A.1
Sussman, S.2
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25
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33947343963
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2 as the terminal oxidant: (a) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1936, 58, 1302-1305. (b) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1937, 59, 2345-2347. (c) Milas, N. A.; Sussman, S.; Mason, H. S. J. Am. Chem. Soc. 1939, 61, 1844-1847. (d) Milas, N. A.; Trepagnier, J. H.; Nolan, J. T.; Iliopulos, M. I. J. Am. Chem. Soc. 1959, 81, 4730-4733.
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Milas, N.A.1
Sussman, S.2
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26
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0005912994
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2 as the terminal oxidant: (a) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1936, 58, 1302-1305. (b) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1937, 59, 2345-2347. (c) Milas, N. A.; Sussman, S.; Mason, H. S. J. Am. Chem. Soc. 1939, 61, 1844-1847. (d) Milas, N. A.; Trepagnier, J. H.; Nolan, J. T.; Iliopulos, M. I. J. Am. Chem. Soc. 1959, 81, 4730-4733.
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Milas, N.A.1
Sussman, S.2
Mason, H.S.3
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27
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0001115462
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2 as the terminal oxidant: (a) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1936, 58, 1302-1305. (b) Milas, N. A.; Sussman, S. J. Am. Chem. Soc. 1937, 59, 2345-2347. (c) Milas, N. A.; Sussman, S.; Mason, H. S. J. Am. Chem. Soc. 1939, 61, 1844-1847. (d) Milas, N. A.; Trepagnier, J. H.; Nolan, J. T.; Iliopulos, M. I. J. Am. Chem. Soc. 1959, 81, 4730-4733.
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Milas, N.A.1
Trepagnier, J.H.2
Nolan, J.T.3
Iliopulos, M.I.4
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29
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Bergstad, K.; Piet, J. J. N.; Bäckvall, J. E. J. Org. Chem. 1999, 64, 2545-2548.
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Bergstad, K.1
Piet, J.J.N.2
Bäckvall, J.E.3
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30
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13044289564
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4a
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4a
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31
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0000374069
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2 with related flavins to give flavin hydroperoxides see: (a) Kemal, C.; Bruice, T. C. Proc. Natl. Acad. Sci. U.S.A. 1976, 73, 995. (b) Mager, H. I. X.; Berends, W. Tetrahedron 1976, 32, 2303.
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Kemal, C.1
Bruice, T.C.2
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32
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0001299668
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2 with related flavins to give flavin hydroperoxides see: (a) Kemal, C.; Bruice, T. C. Proc. Natl. Acad. Sci. U.S.A. 1976, 73, 995. (b) Mager, H. I. X.; Berends, W. Tetrahedron 1976, 32, 2303.
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Tetrahedron
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Mager, H.I.X.1
Berends, W.2
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33
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13044260441
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2 oxidations were carried out according to the procedure by Milas (see ref 12)
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2 oxidations were carried out according to the procedure by Milas (see ref 12).
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34
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13044281034
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2 (2.5 h) in the oxidation of 1 did not result in any considerable change in the reaction outcome, and the diol 2 was isolated in 83% yield
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2 (2.5 h) in the oxidation of 1 did not result in any considerable change in the reaction outcome, and the diol 2 was isolated in 83% yield.
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35
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13044277821
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11b,19b has been tested so far
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11b,19b has been tested so far.
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36
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13044259114
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2PHAL = hydroquinidine 1,4-phthalazinediyl diether
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2PHAL = hydroquinidine 1,4-phthalazinediyl diether.
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37
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13044269888
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note
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In this case it was necessary to change solvent to t-BuOH since the oxidation in acetone gave a lower ee. Also, the olefin had to be added slowly (over 9 h), since addition of all olefin at once gave only 74% ee. Optimization of the enantioselectivity for different olefins with the present system will require further studies (variation of solvent, addition time, temperature, etc).
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