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Volumn , Issue 7, 2003, Pages 961-1008

Recent advances in asymmetric [3,3]-sigmatropic rearrangements

Author keywords

Asymmetric Claisen rearrangement; Chiral auxiliary; Chiral catalyst; Chiral metal complex; Cope rearrangement

Indexed keywords

COMPLEXATION; MOLECULAR STRUCTURE; REACTION KINETICS; SYNTHESIS (CHEMICAL);

EID: 0038695134     PISSN: 00397881     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2003-39171     Document Type: Review
Times cited : (248)

References (277)
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    • A Johnson rearrangement involving such a system was found to be unselective: (a) Tadano, K.; Idogaki, Y.; Yamada, H.; Suami, T. Chem Lett. 1985, 1925. (b) Tadano, K.; Idogaki, Y.; Yamada, H.; Suami, T. J. Org. Chem. 1987, 52, 1201.
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    • The Ireland-type rearrangements are characterized by metal enolates beating chiral ligands. These reactions are discussed in chapter 5 (vide infra).
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    • The reversibility had been proven by subjecting the pure product to the reaction conditions resulting in the Claisen reactant and potentially some other diastereomers.
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    • The use of Hünig's base resulted in a disappointing yield of only 36%. Barton's base: pentaisopropylguanidine.
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    • note
    • The boron ester formation was crucial for the Claisen rearrangement to proceed. In the absence of an o-OH group the reaction failed. The o-OH group could be replaced by a carboxylic acid function but such conversion resulted a lower yield and a decreased enantioselectivity. Additionally some p-product was isolated.
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    • However this special variant did obviously not suffer from any von Braun type degradation or from any [2+2]-cycloadditions as reported in previous publications and references cited therein).
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    • Reacting non-symmetric enol ethers the palladium-catalyzed version preferentially gave the less-substituted vinyl systems. The rearrangement passed through a boat-like transition state. In contrast the proton-catalyzed reaction gave the higher substituted vinylether and the thermal rearrangement (100 °C) passed through a chair-like transition state. Regio- and stereochemistry could be influenced by a careful choice of the reaction conditions. For the discussion of a two-step reaction mechanism see Overman amidate rearrangements?
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    • Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
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    • Nakamura, S.1    Ishihara, K.2    Yamamoto, H.3
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    • Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
    • (2002) Tetrahedron Lett. , vol.43 , pp. 5837
    • Shiina, I.1    Nagasue, H.2
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    • Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
    • (2002) Tetrahedron Lett. , vol.43 , pp. 3633
    • Hashimoto, H.1    Jin, T.2    Karikomi, M.3    Seki, K.4    Hagaa, K.5    Uyeharaa, T.6
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    • (c) For a direct allylation of diazoketones as a surrogate for catalyzed enantioselective Claisen rearrangements see: Davies, H. M. L.; Ren, P.; Jin, Q. Org. Lett. 2001, 3, 3587.
    • (2001) Org. Lett. , vol.3 , pp. 3587
    • Davies, H.M.L.1    Ren, P.2    Jin, Q.3
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    • note
    • The rhodium catalyst did not influence the Claisen rearrangement step.
  • 150
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    • note
    • (b) The Claisen rearrangement is an ideal precursor for olefin converting consecutive processes such as metathesis dihydroxylations etc.
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    • (a) Abraham, L.; Czerwonka, R.; Hiersemann, M. Angew. Chem. Int. Ed. 2001, 40, 4700; Angew. Chem. 2001, 113, 4835.
    • (2001) Angew. Chem. , vol.113 , pp. 4835
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    • (e) For the thermal and palladium-catalyzed racemic rearrangement see: Overman, L. E.; Zipp, G. G. J. Am. Chem. Soc. 1997, 62, 2288.
    • (1997) J. Am. Chem. Soc. , vol.62 , pp. 2288
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    • For oxy-Cope-aldol tandem process see ref.
    • For an aza-Cope-Mannich tandem process see: (a) Knight, S. D.; Overman, L. E.; Pairaudeau, G. J. Am. Chem. Soc. 1995, 117, 5776. (b) For oxy-Cope-aldol tandem process see ref.
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    • For an example where a chiral chromium arene complex did not affect the stereochemical outcome of a Cope rearrangement see: (a) Mandal, S. K.; Sarkar, A. J. Chem. Soc., Perkin Trans. 1 2002, 669. (b) For an aza-Cope rearrangement via chromium carbene complexes see: Barluenga, J.; Tomas, M.; Ballesteros, A.; Santamaria, J.; Suarez-Sobrino, A. J. Org. Chem. 1997, 62, 9229.
    • (2002) J. Chem. Soc., Perkin Trans. 1 , pp. 669
    • Mandal, S.K.1    Sarkar, A.2
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    • For an example where a chiral chromium arene complex did not affect the stereochemical outcome of a Cope rearrangement see: (a) Mandal, S. K.; Sarkar, A. J. Chem. Soc., Perkin Trans. 1 2002, 669. (b) For an aza-Cope rearrangement via chromium carbene complexes see: Barluenga, J.; Tomas, M.; Ballesteros, A.; Santamaria, J.; Suarez-Sobrino, A. J. Org. Chem. 1997, 62, 9229.
    • (1997) J. Org. Chem. , vol.62 , pp. 9229
    • Barluenga, J.1    Tomas, M.2    Ballesteros, A.3    Santamaria, J.4    Suarez-Sobrino, A.5
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    • note
    • The 3,5-rearrangement can be described as an iminium salt olefin addition and a subsequent fragmentation (cation stabilization). No new stereogenic center was constructed.
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    • (f) For a recent publication (1,3 chirality transfer in 2-oxonia Cope rearrangements see: Loh, T.-P.; Hu, Q.-Y.; Ma, L.-T. Org. Lett. 2002, 4, 2389.
    • (2002) Org. Lett. , vol.4 , pp. 2389
    • Loh, T.-P.1    Hu, Q.-Y.2    Ma, L.-T.3
  • 186
    • 0035891722 scopus 로고    scopus 로고
    • The reversibility of the Cope rearrangement might cause some racemization - the avoiding of such a process was recommended. Alternatively a Prins cyclization could be discussed as the basic reaction mechanism. Cope rearrangements were found to be much faster than the Prins reaction. For the role of oxonia Cope rearrangements in Prins cyclizations see: (a) Rychnovsky, S. D.; Marumoto, S.; Jaber, J. J. Org. Lett. 2001, 3, 3815. (b) Marumoto, S.; Jaber, J. J.; Vitale, J. P.; Rychnovsky, S. D. Org. Lett. 2002, 4, 3919.
    • (2001) Org. Lett. , vol.3 , pp. 3815
    • Rychnovsky, S.D.1    Marumoto, S.2    Jaber, J.J.3
  • 187
    • 0013254056 scopus 로고    scopus 로고
    • The reversibility of the Cope rearrangement might cause some racemization - the avoiding of such a process was recommended. Alternatively a Prins cyclization could be discussed as the basic reaction mechanism. Cope rearrangements were found to be much faster than the Prins reaction. For the role of oxonia Cope rearrangements in Prins cyclizations see: (a) Rychnovsky, S. D.; Marumoto, S.; Jaber, J. J. Org. Lett. 2001, 3, 3815. (b) Marumoto, S.; Jaber, J. J.; Vitale, J. P.; Rychnovsky, S. D. Org. Lett. 2002, 4, 3919.
    • (2002) Org. Lett. , vol.4 , pp. 3919
    • Marumoto, S.1    Jaber, J.J.2    Vitale, J.P.3    Rychnovsky, S.D.4
  • 192
    • 0038020862 scopus 로고    scopus 로고
    • note
    • n-BuLi was found to be the base of choice to induce the anionic amino Cope rearrangements. Experiments using alternative strong bases such as LDA and KHMDS failed.
  • 197
    • 0038022036 scopus 로고    scopus 로고
    • note
    • In contrast to the Oppolzer sultams the corresponding Evans auxiliary gave only moderate chiral induction of about 50% de building-up the new stereogenic center.
  • 203
    • 0033949478 scopus 로고    scopus 로고
    • For potential catalysts see: (a) Helmchen, G.; Pfaltz, A. Acc. Chem. Res. 2000, 33, 336. (b) Fache, F.; Schulz, E.; Tommasino, M. L.; Lemaire, M. Chem. Rev. 2000, 100, 2159.
    • (2000) Acc. Chem. Res. , vol.33 , pp. 336
    • Helmchen, G.1    Pfaltz, A.2
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    • 0038359042 scopus 로고    scopus 로고
    • note
    • For a mechanistic discussion concerning the stereochemical outcome of the asymmetric catalyzed cyclopropanation see the original references.
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    • (a) Fehr, C.; Galindo, J. A. Angew. Chem. Int. Ed. 2000, 39, 569; Angew. Chem. 2000, 112, 581.
    • (2000) Angew. Chem. , vol.112 , pp. 581


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