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0001315801
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(4) Hassner, A.; Maurya, R.; Friedman, O.; Gottlieb, H. E.; Padwa, A.; Austin, D. J. Org. Chem. 1993, 58, 4539; Padwa, A.; Dean, D. C.; Osterhout, M. H.; Precedo, L.; Semones, M. A. Ibid. 1994, 59, 5347; Silverstein, R. M.; Bassler, G. C.; Morrill, T. C. In Spectrometric Identification of Organic Compounds, 4th ed.; Wiley; New York, 1981.
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(4) Hassner, A.; Maurya, R.; Friedman, O.; Gottlieb, H. E.; Padwa, A.; Austin, D. J. Org. Chem. 1993, 58, 4539; Padwa, A.; Dean, D. C.; Osterhout, M. H.; Precedo, L.; Semones, M. A. Ibid. 1994, 59, 5347; Silverstein, R. M.; Bassler, G. C.; Morrill, T. C. In Spectrometric Identification of Organic Compounds, 4th ed.; Wiley; New York, 1981.
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Padwa, A.1
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0003520774
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Wiley; New York
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(4) Hassner, A.; Maurya, R.; Friedman, O.; Gottlieb, H. E.; Padwa, A.; Austin, D. J. Org. Chem. 1993, 58, 4539; Padwa, A.; Dean, D. C.; Osterhout, M. H.; Precedo, L.; Semones, M. A. Ibid. 1994, 59, 5347; Silverstein, R. M.; Bassler, G. C.; Morrill, T. C. In Spectrometric Identification of Organic Compounds, 4th ed.; Wiley; New York, 1981.
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Silverstein, R.M.1
Bassler, G.C.2
Morrill, T.C.3
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8
-
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85030279131
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note
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(5) The ratios of the (Z)-isomers to the internal standard by HPLC were constant within experimental errors during the measurements of kinetics.
-
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-
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9
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0001388951
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(6) Tschaen, D. M.; Turos, E. ; Weinreb, S. M. J. Org. Chem. 1984, 49, 5058.
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Weinreb, S.M.3
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12
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85030270673
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Seiler Research Laboratory, U. S. Air Force Academy, Colorado Springs, CO 80840
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(9) Stewart, J. J. P. Frank J. Seiler Research Laboratory, U. S. Air Force Academy, Colorado Springs, CO 80840.
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Stewart, J.J.P.1
Frank, J.2
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13
-
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85030277939
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note
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(10) The details of geometries of the TS 1, intermediates, and TS 2 as well as their atomic charge distribution would be reported elsewhere.
-
-
-
-
14
-
-
85030274325
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-
note
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(11) The potential energy surface in this region is almost flat and slight structural alterations result in a shallow hollow.
-
-
-
-
15
-
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0026032476
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(12) For a review on 1,7-cyclizations of the α,β,γ,δ-conjugated 1,3-dipoles: Zecchi, G. Synthesis 1991, 181.
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Zecchi, G.1
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17
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0026078572
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(14) The limitations of energy difference in the potential energy surface of PM3 calculations were also discussed in the hetero Diels-Alder reaction; Sustmann, R; Sicking, W.; Lamy-Schelkens, H.; Ghosez, L. Tetrahedron Lett. 1991, 32, 1401.
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Sustmann, R.1
Sicking, W.2
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18
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0027223591
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(15) Dewar, M. J. S.; Jie, C.; Yu, J. Tetrahedron 1993, 49, 5003; Rzepa, H. S.; Molina, P.; Alajarrin, M.; Viedal, A. Ibid. 1992, 48, 7425; Sutmann, R.; Sicking, W. Ibid. 1992, 48, 10293.
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Tetrahedron
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Dewar, M.J.S.1
Jie, C.2
Yu, J.3
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19
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0026641806
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(15) Dewar, M. J. S.; Jie, C.; Yu, J. Tetrahedron 1993, 49, 5003; Rzepa, H. S.; Molina, P.; Alajarrin, M.; Viedal, A. Ibid. 1992, 48, 7425; Sutmann, R.; Sicking, W. Ibid. 1992, 48, 10293.
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Rzepa, H.S.1
Molina, P.2
Alajarrin, M.3
Viedal, A.4
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0026498168
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(15) Dewar, M. J. S.; Jie, C.; Yu, J. Tetrahedron 1993, 49, 5003; Rzepa, H. S.; Molina, P.; Alajarrin, M.; Viedal, A. Ibid. 1992, 48, 7425; Sutmann, R.; Sicking, W. Ibid. 1992, 48, 10293.
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Sutmann, R.1
Sicking, W.2
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21
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84986437005
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Chang, C.7
Hendrikson, T.8
Still, W.C.9
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