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0000420637
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Analogous results were observed by radical cyclisation of enamides bearing (S)-1-phenylethyl group on the nitrogen atom, leading to β-lactams: a) Ishibashi, H.; Kameoka, C.; Tatsunori, S.; Ikeda, M. Synlett, 1994, 445-446.
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37
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85029991557
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note
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i = 1, k = 1.986 (cal/mol · K), and T = 298 (K).
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38
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0023043811
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85029991804
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note
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A similar trend resulted for the heats of formation of the transition states TS', calculated by AM1-UHF method. In fact the following values were found: TS'-1(A): -8.06 kcal/mol, TS'-1(B): -9.19 kcal/mol; TS'-2(A): -8.83 kcal/mol; TS'-2(B): -8.85 kcal/mol.
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46
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