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19
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8644230555
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note
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In the publication by Marshall, another definition of the angle β is used. We took the original definition as given by Ball.
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21
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0035855343
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0037074081
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F.J.R. Rombouts, W. De Borggraeve, S.M. Toppet, F. Compernolle, and G.J. Hoornaert Tetrahedron Lett. 42 2001 7397 7399
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Van Der Eycken, E.5
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32
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8644268482
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note
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This is dependent on the site of cleavage of a bicyclic lactam further on in the synthesis.
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33
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8644291987
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note
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Isolation of the pure imidoyl chlorides is possible if dry toluene is used. However, these compounds still tend to hydrolise during further purification manipulations.
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34
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8644229744
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note
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Addition of a drop of water to the toluene mixture in which the Diels-Alder reaction is performed avoids the subsequent hydrolysis step.
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35
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0036828174
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Van Der Eycken, E.1
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Dallinger, D.5
Kappe, C.O.6
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36
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2342500882
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Verbist, B.M.P.1
Smets, W.J.2
De Borggraeve, W.M.3
Compernolle, F.4
Hoornaert, G.J.5
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37
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0038718481
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Rogiers, J.1
De Borggraeve, W.M.2
Toppet, S.M.3
Compernolle, F.4
Hoornaert, G.J.5
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39
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1642528338
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T.R. Hoye, B.M. Eklov, T.D. Ryba, M. Voloshin, and L. Yao J. Org. Lett. 6 2004 953 956
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Hoye, T.R.1
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Voloshin, M.4
Yao, L.5
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40
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8644248615
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note
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In our case, we performed the reaction in an NMR tube containing HCl saturated MeOH and the bicyclic lactam.
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41
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8644225330
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note
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These values are derived from the analysis of small cyclic peptides. It is possible that for smaller model systems the shielding of the NH in a hydrogen bond is less efficient. So less stringent criteria might be adopted here.
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