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c) Nicolaou, K. C.; Barnette, W. E.; Magolda, R. L. J. Am. Chem. Soc. 1981, 103, 3472-3480;
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Nicolaou, K.C.1
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0001382823
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c) Bach, T.; Kather, K.; Kramer, O. J. Org. Chem. 1998, 63, 1910-1918.
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Bach, T.1
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0013424606
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2. The articles published prior to 1987 have been reviewed in a) Vedejs, E., Krafft; G. A. Tetrahedron 1982, 38, 2857-2881;
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Tetrahedron
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Vedejs, E.1
Krafft, G.A.2
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8
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0030033252
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4. Eames, J.; Jones, R. V. H.; Warren, S. Tetrahedron Lett. 1996, 37, 707-710.
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(1996)
Tetrahedron Lett.
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Eames, J.1
Jones, R.V.H.2
Warren, S.3
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11
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0000360093
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6. a) Ren, X.-F.; Turos, E.; Lake, C. H.; Churchill, M. R. J. Org. Chem. 1995, 60, 6468-6483;
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Ren, X.-F.1
Turos, E.2
Lake, C.H.3
Churchill, M.R.4
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12
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0001333953
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b) Ren, X.-F.; Konaklieva, M. I.; Turos, E.; Krajkowski, L. M.; Lake, C. H.; Janik, T. S.; Churchill, M. R. ibid. 6484-6495.
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Konaklieva, M.I.2
Turos, E.3
Krajkowski, L.M.4
Lake, C.H.5
Janik, T.S.6
Churchill, M.R.7
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15
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17444363662
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8. Ten articles including the first one, Ozaki, S.; Matsushita, H.; Ohmori, H. J. Chem. Soc., Chem. Commun. 1992, 1120-1122;
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Ozaki, S.1
Matsushita, H.2
Ohmori, H.3
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16
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0031003930
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the latest one, Ozaki, S.; Matsui, E.; Waku, J.; Ohmori, H. Tetrahedron Lett. 1997, 38, 2705-2708.
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Ozaki, S.1
Matsui, E.2
Waku, J.3
Ohmori, H.4
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17
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85038553362
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The nickel complexes used as catalysts are shown below. (formula presented) All complexes are stable and can be stored at ambient temperature for several years. The cyclic voltammetric behaviors of Ni(II)(bae) and Ni(II)(salen) in the presence of thioacetate 1a suggested that these complexes would transfer an electron to 1a but not to ethyl 6-hydroxy-2-hexynoate, though both 1a and the hexynoate exhibit each reductive peak at the similar potential, around -2.30 V vs. SCE. The detailed procedures of cyclic voltammetry are available in the literatures shown below.
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9. The nickel complexes used as catalysts are shown below. (formula presented) All complexes are stable and can be stored at ambient temperature for several years. The cyclic voltammetric behaviors of Ni(II)(bae) and Ni(II)(salen) in the presence of thioacetate 1a suggested that these complexes would transfer an electron to 1a but not to ethyl 6-hydroxy-2-hexynoate, though both 1a and the hexynoate exhibit each reductive peak at the similar potential, around -2.30 V vs. SCE. The detailed procedures of cyclic voltammetry are available in the literatures shown below.
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-
-
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19
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37049090272
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b) Ozaki, S.; Matsushita, H.; Ohmori, H; J. Chem. Soc., Perkin Trans, 1 1993, 649-651
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(1993)
J. Chem. Soc., Perkin Trans, 1
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Ozaki, S.1
Matsushita, H.2
Ohmori, H.3
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20
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85038543136
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note
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4, r. t.
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-
-
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21
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85038541942
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note
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2) The stereochemical assignments of 2a and 2j were done based on NOE difference spectroscopy. The minor isomer of 2a did not show the enhancement. (formula presented)
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-
-
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22
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0344361923
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12. Baldwin's rule , which is best applied to systems containing only first row elements, indicates that 4-exo-dig cyclizations in nucleophilic ring closure are disfavored processes. Baldwin, J. E. J. Chem. Soc., Chem. Commun. 1976, 734-736.
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(1976)
J. Chem. Soc., Chem. Commun.
, pp. 734-736
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Baldwin, J.E.1
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23
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85038547433
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The ring closure of the 4-pentenyl radical proceeds slowly at ordinary temperature, but there can be little doubt that it will exclusively follow the exo-mode.
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13. The ring closure of the 4-pentenyl radical proceeds slowly at ordinary temperature, but there can be little doubt that it will exclusively follow the exo-mode.
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