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0024321993
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16
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27944440280
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note
-
In this reaction, 7β-isomer was not obtained.
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-
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19
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27944480614
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-
note
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13C-NMR spectrum.
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-
-
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21
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27944436338
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note
-
Diastereoselectivity in the epoxidation of 14 and 17 can be explained based on the transition state in which vanadium metal is coordinated with hydroxy group at C-12. See ref. 8.
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22
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0018427662
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Fukuyama T., Akasaka K., Karanewsky D. S., Wang C.-L. J., Schmidt G., Kishi Y., J. Am. Chem. Soc., 101, 262-263 (1979).
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Fukuyama, T.1
Akasaka, K.2
Karanewsky, D.S.3
Wang, C.-L.J.4
Schmidt, G.5
Kishi, Y.6
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23
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27944456260
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note
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The stereoselectivity of epoxidation with mCPBA is explained by preferential attack of the reagent from the less hindered side. See ref. 8.
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-
-
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24
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27944458596
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note
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On a larger scale, this procedure will sometimes lead to violent explosions. See ref. 12 and 13.
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25
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18844410382
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2 was prepared by using Sharpless's procedure. See: Gao Y., Hanson R. M., Klunder J. M., Ko S. Y., Masamune H., Sharpless K. B., J. Am. Chem. Soc., 109, 5765-5780 (1987).
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Gao, Y.1
Hanson, R.M.2
Klunder, J.M.3
Ko, S.Y.4
Masamune, H.5
Sharpless, K.B.6
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