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Volumn 61, Issue 9, 1996, Pages 3080-3087

The role of spin-orbit coupling and symmetry in oxadi-π-methane rearrangements and some related photochemical reactions

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EID: 0001122131     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo951567e     Document Type: Article
Times cited : (13)

References (96)
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    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • de Mayo, P., Ed.; Academic Press: New York
    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • Padwa, A., Ed.; Marcel Dekker, Inc.: New York, and references cited therein
    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
    • (1991) Organic Photochemistry , vol.11 , pp. 37-109
    • Demuth, M.1
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    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • and references cited therein
    • For reviews, see: (a) Hixson, S. S.; Mariano, P. S.; Zimmerman, H. E. Chem. Rev. 1973, 73, 531-551. (b) Dauben, W. G.; Lodder, G.; Ipaktschi, J. Top. Curr. Chem. 1975, 54, 73-114. (c) Schaffner, K. Tetrahedron 1976, 32, 641-653. (d) Hook, K. N. Chem. Rev. 1976, 76, 1-74. (e) Schuster, D. I. Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic Press: New York, 1980; Vol. 3, pp 167-279. (f) Demuth, M. Organic Photochemistry; Padwa, A., Ed.; Marcel Dekker, Inc.: New York, 1991; Vol. 11, pp 37-109 and references cited therein. (g) Demuth, M.; Schaffner, K. Angew. Chem., Int. Ed. Engl. 1982, 21, 820-836. (h) Koppes, M. J. C. M.; Cerfontain, H. Recl. Trav. Chim. Pays-Bas 1985, 104, 272-276 and references cited therein.
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    • note
    • In order to facilitate the discussion of the dependence of orbital interactions and photorearrangements on the geometries of the β,γ-unsaturated carbonyls and related systems, the numbering definition shown in 1-9 will be used throughout the whole study, unless stated otherwise. Thus, in this work, C-3 means C-α, C-2 means C-β, and C-1 means C-γ.
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    • Note the recent di-π-methane rearrangement computations, which are formally analogous to the ODPM rearrangement, (a) On a singlet reaction: Reguero, M.; Bernardi, F.; Jones, H.; Olivucci, M.; Ragazos, I. N.; Robb, M. A. J. Am. Chem. Soc. 1993, 115, 2073-2074. (b) On a triplet reaction: Quenemoen, K.; Borden, W. T.; Davidson, E. R.; Feller, D. J. Am. Chem. Soc. 1985, 107, 5054-5059. (c) Zimmerman, H. E.; Kamath, A. J Am. Chem. Soc. 1988, 110, 900-911.
    • (1993) J. Am. Chem. Soc. , vol.115 , pp. 2073-2074
    • Reguero, M.1    Bernardi, F.2    Jones, H.3    Olivucci, M.4    Ragazos, I.N.5    Robb, M.A.6
  • 30
    • 0001521928 scopus 로고
    • Note the recent di-π-methane rearrangement computations, which are formally analogous to the ODPM rearrangement, (a) On a singlet reaction: Reguero, M.; Bernardi, F.; Jones, H.; Olivucci, M.; Ragazos, I. N.; Robb, M. A. J. Am. Chem. Soc. 1993, 115, 2073-2074. (b) On a triplet reaction: Quenemoen, K.; Borden, W. T.; Davidson, E. R.; Feller, D. J. Am. Chem. Soc. 1985, 107, 5054-5059. (c) Zimmerman, H. E.; Kamath, A. J Am. Chem. Soc. 1988, 110, 900-911.
    • (1985) J. Am. Chem. Soc. , vol.107 , pp. 5054-5059
    • Quenemoen, K.1    Borden, W.T.2    Davidson, E.R.3    Feller, D.4
  • 31
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    • Note the recent di-π-methane rearrangement computations, which are formally analogous to the ODPM rearrangement, (a) On a singlet reaction: Reguero, M.; Bernardi, F.; Jones, H.; Olivucci, M.; Ragazos, I. N.; Robb, M. A. J. Am. Chem. Soc. 1993, 115, 2073-2074. (b) On a triplet reaction: Quenemoen, K.; Borden, W. T.; Davidson, E. R.; Feller, D. J. Am. Chem. Soc. 1985, 107, 5054-5059. (c) Zimmerman, H. E.; Kamath, A. J Am. Chem. Soc. 1988, 110, 900-911.
    • (1988) J Am. Chem. Soc. , vol.110 , pp. 900-911
    • Zimmerman, H.E.1    Kamath, A.2
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    • note
    • The reason for ignoring the one-center SO coupling terms here is that the chemical bond formed arises from the overlap of orbitala at two centers and only the formation and breakage of chemical bonds are concerned in such rearrangements, Therefore, for simplicity, we did not consider the one-center effect. Even if the one-centre SO coupling terms are considered, the key conclusions will not be altered.
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    • (a) Reference 1b,f.
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    • note
    • One reviewer has pointed out that the triplet biradicals were found to be involved in a few cases for ODPM rearrangement in his laboratory. Nevertheless, those observations could be special cases since, to our knowledge, those photoreactions occur so fast (below 1 ps) that experimentalists are exceedingly unlikely to detect the reactions directly. As a result, it is reasonable to believe that, in general, ODPM rearrangements should occur in a concerted manner.
  • 61
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    • note
    • This prediction is also strongly confirmed by the phtotrearrangements of triplet cyclohexenone stsytems, which occur by migration of the aryl group from C-γ to C-β and formation of a new bond between C-α. and C-γ. For details see ref 6
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    • For a recent review see: Schuster, D. I. In The Chemistry of Enones; Patai, S., Rappoport, Z., Eds.; John Wiley and Sons, Ltd: Chichester, England. 1989; pp 623-756.
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    • note
    • However, at low temperature (-140°C) a bicyclo[2.1.0]-pentanone intermediate was observed; see ref 19b. Nevertheless, Zimmerman and Little also questioned that whether this is sufficient evidence that this is the mechanism followed at room temperature since reaction mechanisms may well be temperature dependent.
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    • In the case of spirocyclic β,γ,σ,ε-unsaturated carbonyl systems, the methane carbon (i.e., C-3 in 20 and 21) represents a spiro center.
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    • note
    • This allylic diradical intermediate may then decay to those two observed photoproducts (see 20 and 21) with different rates. Nevertheless, as discussed in this work, the ODPM rearrangement (endo isomer) will take place preferentially than the case C pathway.
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    • Reference 1a
    • (e) Reference 1a.
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    • The Benjamin/Cummings Co.: Menlo Park, CA, Chapter 6
    • (a) For a lucid summary of the mechanistic and spectroscopic studies, see: Turro, N. J. Modern Molecular Photochemistry; The Benjamin/Cummings Co.: Menlo Park, CA, 1978; Chapter 6.
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    • References 8 and 25
    • Other factors which are known to affect singlet-triplet intersystem crossing include the following: (1) the magnitude of the singlet-triplet energy difference between the two states; (2) the configuration of the initial and of the final states; and (3) vibronic or Frank-Condon factors. See: (a) References 8 and 25. (b) Robinson, G. W.; Frosch, R. P. J. Chem. Phys. 1962, 37, 1962-1973; (c) J. Chem. Phys. 1963, 38, 1187-1203. (d) Borkman, R. F. Mol. Photochem. 1972, 4, 453-471.
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    • Other factors which are known to affect singlet-triplet intersystem crossing include the following: (1) the magnitude of the singlet-triplet energy difference between the two states; (2) the configuration of the initial and of the final states; and (3) vibronic or Frank-Condon factors. See: (a) References 8 and 25. (b) Robinson, G. W.; Frosch, R. P. J. Chem. Phys. 1962, 37, 1962-1973; (c) J. Chem. Phys. 1963, 38, 1187-1203. (d) Borkman, R. F. Mol. Photochem. 1972, 4, 453-471.
    • (1962) J. Chem. Phys. , vol.37 , pp. 1962-1973
    • Robinson, G.W.1    Frosch, R.P.2
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    • Other factors which are known to affect singlet-triplet intersystem crossing include the following: (1) the magnitude of the singlet-triplet energy difference between the two states; (2) the configuration of the initial and of the final states; and (3) vibronic or Frank-Condon factors. See: (a) References 8 and 25. (b) Robinson, G. W.; Frosch, R. P. J. Chem. Phys. 1962, 37, 1962-1973; (c) J. Chem. Phys. 1963, 38, 1187-1203. (d) Borkman, R. F. Mol. Photochem. 1972, 4, 453-471.
    • (1963) J. Chem. Phys. , vol.38 , pp. 1187-1203
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    • Other factors which are known to affect singlet-triplet intersystem crossing include the following: (1) the magnitude of the singlet-triplet energy difference between the two states; (2) the configuration of the initial and of the final states; and (3) vibronic or Frank-Condon factors. See: (a) References 8 and 25. (b) Robinson, G. W.; Frosch, R. P. J. Chem. Phys. 1962, 37, 1962-1973; (c) J. Chem. Phys. 1963, 38, 1187-1203. (d) Borkman, R. F. Mol. Photochem. 1972, 4, 453-471.
    • (1972) Mol. Photochem. , vol.4 , pp. 453-471
    • Borkman, R.F.1


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