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3 without noticeable effect on yield or rate.
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34
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0141653286
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note
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3) in one pot.
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35
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note
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2]-3 prior to protonation. The values obtained by simulation are given in Table 3.
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36
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We were unable to locate a commercial source of anhydrous HI solution. Instead it was prepared in situ by metathesis of excess NaI with HCl in MeCN (in which NaI is fairly soluble but NaCl is not) and then precipitation of excess NaI by addition of diethyl ether.
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37
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note
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1H}NMR spectrum.
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38
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0141430341
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note
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+.
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39
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37049142288
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2HJ(C,N) type coupling. However, in solution such interaction (if present at all) is transient as it is well known that enantiotopic methyl groups in 6 (see R. W. Alder, J. E. Anderson, J. Chem. Soc. Perkin Trans. 2 1974, 2086) and analogous systems undergo rapid interconversion at the NMR time scale. We suggest that instead, this phenomenon arises from a through-space coupling brought about by the timc-average proximity of the carbon and nitrogen centres during rapid interconversion of enantiomeric forms of 6.
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18] for each compound.
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