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See also Supporting Information for kinetic data.
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2 were preferred solvents due to better solubility of Lewis acid catalysts and faster reactions in most cases.
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0842283011
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note
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CCDC-214434 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.hmtl (or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: (+44) 1223-336-033; or email: deposit@ccdc.cam.ac. uk).
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47
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0842304678
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note
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2O (see Experimental Section).
-
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0842326230
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note
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Due to the wide signal separation, the extent of protonation can even be assessed in the presence of paramagnetic metal ions which cause considerable line broadening.
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59
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0842304679
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note
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3CN, 12 h).
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3CN).
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67
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0842347887
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3CN (see Supporting Information).
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0842326223
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II catalysts, see refs [5a, e].
-
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75
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0842347890
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note
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IV-complexes have also been used. However, the mechanism of this reaction is not clear (see ref [13d]).
-
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76
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84970599884
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II species is still responsible for related reactivities [see: a) R. G. F. Giles, V. R. Lee Son, M. V. Sargent, Aust. J. Chem. 1990, 43, 777-781;
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86
-
-
0842283010
-
-
note
-
Most aza- and oxa-Michael addition reactions described in this report were reversible.
-
-
-
-
87
-
-
0842283008
-
-
note
-
2H coupling.
-
-
-
-
88
-
-
0842347888
-
-
note
-
It is conceivable that one of these species is an oxazine derivative, which can be formed in acid-catalysed Ritter reactions, see ref. [24]
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-
-
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