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(a) Beauchemin, A. M.; Moran, J.; Lebrun, M.-E.; Séguin, C.; Dimitrijevic, E.; Zhang, L.; Gorelsky, S. I. Angew. Chem., Int. Ed. 2008, 47, 1410.
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58849111839
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(b) Moran, J.; Gorelsky, S. I.; Dimitrijevic, E.; Lebrun, M.-E.; Bédard, A.-C.; Séguin, C.; Beauchemin, A. M. J. Am. Chem. Soc. 2008, 130, 17893.
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Séguin, C.6
Beauchemin, A.M.7
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16
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61749085873
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(c) Bourgeois, J.; Dion, I.; Cebrowski, P. H.; Loiseau, F.; Bédard, A.-C.; Beauchemin, A. M. J. Am. Chem. Soc. 2009, 131, 874.
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18
-
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0347517806
-
-
Such reactions are also called reverse Cope cyclizations/eliminations. For a review, see
-
Such reactions are also called reverse Cope cyclizations/eliminations. For a review, see: Cooper, N. J.; Knight, D. W. Tetrahedron 2004, 60, 243.
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Cooper, N.J.1
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19
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85057635150
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For analogous intermolecular reactivity of hydrazines with alkynes, see
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For analogous intermolecular reactivity of hydrazines with alkynes, see: Cebrowski, P. H.; Roveda, J.-G.; Moran, J.; Gorelsky, S. I.; Beauchemin, A. M. Chem. Commun. 2008, 492.
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20
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4544358663
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For a recent review on methods to access di- and trisubstituted hydrazides, see
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For a recent review on methods to access di- and trisubstituted hydrazides, see: Licandro, E.; Perdicchia, D. Eur. J. Org. Chem. 2004, 665.
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21
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0001174236
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For metal-catalyzed variants, see
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For metal-catalyzed variants, see: (a) Hegedus, L. S.; Allen, G. F.; Olsen, D. J. J. Am. Chem. Soc. 1980, 102, 3583.
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23
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(c) Beccalli, E. D.; Broggini, G.; Martinelli, M.; Sottocornola, S. Chem. Rev. 2007, 107, 5318.
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-
25
-
-
67649589153
-
-
note
-
The reaction can also be performed in PhMe, dioxane, MeCN, i-PrOH, DMF, and H2O. See Supporting Information for details.
-
-
-
-
26
-
-
67649586836
-
-
note
-
For hydroxylamines, the proton transfer step of the N-oxide intermediate is kinetically relevant, and the increased reactivity observed in protic solvents (e.g., n-PrOH) is consistent with a bimolecular proton transfer process (e.g., n-PrOH-mediated). See refs 4a,b.
-
-
-
-
27
-
-
67649601222
-
-
note
-
Formation of product 7g in entry 6 is consistent with epimerization of product 7e. See Supporting Information for details.
-
-
-
-
28
-
-
0001231516
-
-
For precedence on aminoisocyanates formation from similar precursors, see
-
For precedence on aminoisocyanates formation from similar precursors, see: Wadsworth, W. S.; Emmons, W. D. J. Org. Chem. 1967, 32, 1279.
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J. Org. Chem.
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-
Wadsworth, W.S.1
Emmons, W.D.2
-
29
-
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2842554994
-
-
Reports on the reactivity of aminoisocyanates are scarce, and such species are known to dimerize and trimerize. For other reactivity, see
-
Reports on the reactivity of aminoisocyanates are scarce, and such species are known to dimerize and trimerize. For other reactivity, see: (a) Lockley, W. J. S.; Lwowski, W. Tetrahedron Lett. 1974, 4263.
-
(1974)
Tetrahedron Lett.
, pp. 4263
-
-
Lockley, W.J.S.1
Lwowski, W.2
-
31
-
-
67649607665
-
-
Reference 12 (and references cited therein)
-
(c) Reference 12 (and references cited therein).
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