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33847575334
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note
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The coupling constant between the olefinic protons of compounds 2a, 2b and 2c were J=15.3, 14.9 and 15.2 Hz, respectively, from the average literature values.
-
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31
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0004464424
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1H NMR spectrum of 2a has been described by: C. C. Tung, A. J. Speziale, H. W. Frazier, J. Org. Chem. 1963, 28, 1514-1521.
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2-Chloroamides 3 were prepared by treatment of 2-chloroacid chlorides with amines.
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33
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33847605637
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note
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A mixture of the corresponding α,β-unsaturaled ester and β-hydroxyester was isolated. See reference [10].
-
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34
-
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33847602408
-
-
note
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However, this "usual" trend is not always followed in samarium-promoted reactions (see reference [9] and references cited therein).
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