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Volumn 131, Issue 31, 2009, Pages 10822-10823

Cationic rhodium(I)-dppf complex-catalyzed olefin isomerization/propargyl claisen rearrangement/carbonyl migration cascade

Author keywords

[No Author keywords available]

Indexed keywords

[CARBONYL; CHEMICAL EQUATIONS; GOOD YIELD; MIGRATION REACTION; PROPARGYL ETHERS; ROOM TEMPERATURE;

EID: 68249156464     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9038449     Document Type: Article
Times cited : (33)

References (38)
  • 1
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    • For recent reviews of cascade reactions, see: a
    • For recent reviews of cascade reactions, see: (a) Chapman, C. J.; Frost, C. G. Synthesis 2007, 1.
    • (2007) Synthesis , pp. 1
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  • 4
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    • For a recent review of transition-metal-catalyzed C-H bond activation, see
    • For a recent review of transition-metal-catalyzed C-H bond activation, see: Kakiuchi, F.; Kochi, T. Synthesis 2008, 3013.
    • (2008) Synthesis , pp. 3013
    • Kakiuchi, F.1    Kochi, T.2
  • 5
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    • For a recent review of π-electrophilic Lewis acid catalysts, see
    • For a recent review of π-electrophilic Lewis acid catalysts, see: Yamamoto, Y. J. Org. Chem. 2007, 72, 7817.
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    • Yamamoto, Y.1
  • 6
    • 84906450372 scopus 로고    scopus 로고
    • For a recent review of transition-metal-catalyzed olefin isomerization, see:, Crabtree, R. H, Mingos, D. M. P, Ojima, I, Eds, Elsevier: Oxford, U.K
    • For a recent review of transition-metal-catalyzed olefin isomerization, see: Tanaka, K. In Comprehensive Organometallic Chemistry III; Crabtree, R. H., Mingos, D. M. P., Ojima, I., Eds.; Elsevier: Oxford, U.K., 2007; Vol. 10, p 71.
    • (2007) Comprehensive Organometallic Chemistry III , vol.10 , pp. 71
    • Tanaka, K.1
  • 7
    • 68249157690 scopus 로고    scopus 로고
    • A mechanism via π-allyl intermediates has been proposed for cationic Rh(I)-bisphosphine complex-catalyzed isomerizations of allylic compounds. Allyl ethers: (a) Fatig, T.; Soulié, J.; Lallemand, J.-Y.; Mercier, F.; Mathey, F. Tetrahedron 2000, 56, 101.
    • A mechanism via π-allyl intermediates has been proposed for cationic Rh(I)-bisphosphine complex-catalyzed isomerizations of allylic compounds. Allyl ethers: (a) Fatig, T.; Soulié, J.; Lallemand, J.-Y.; Mercier, F.; Mathey, F. Tetrahedron 2000, 56, 101.
  • 9
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    • Allyl amines: (c) Nova, A.; Ujaque, G.; Albéniz, A. C.; Espinet, P. Chem. - Eur. J. 2008, 14, 3323.
    • Allyl amines: (c) Nova, A.; Ujaque, G.; Albéniz, A. C.; Espinet, P. Chem. - Eur. J. 2008, 14, 3323.
  • 11
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    • Allylic and propargylic alcohols: (e) Tanaka, K.; Shoji, T.; Hirano, M. Eur. J. Org. Chem. 2007, 2687.
    • Allylic and propargylic alcohols: (e) Tanaka, K.; Shoji, T.; Hirano, M. Eur. J. Org. Chem. 2007, 2687.
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    • and references therein
    • (f) Tanaka, K.; Fu, G. C. J. Am. Chem. Soc. 2001, 123, 11492, and references therein.
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    • Tanaka, K.1    Fu, G.C.2
  • 22
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    • For selected recent examples of sequential olefin isomerization/Claisen rearrangement of di(allyl) ethers, see: (a) Kerrigan, N. J.; Bungard, C. J.; Nelson, S. G. Tetrahedron 2008, 64, 6863.
    • For selected recent examples of sequential olefin isomerization/Claisen rearrangement of di(allyl) ethers, see: (a) Kerrigan, N. J.; Bungard, C. J.; Nelson, S. G. Tetrahedron 2008, 64, 6863.
  • 31
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    • For a Ag(I)-catalyzed propargyl Claisen rearrangement, see: Grissom, J. W.; Klingberg, D.; Huang, D.; Slattery, B. J. J. Org. Chem. 1997, 62, 603.
    • For a Ag(I)-catalyzed propargyl Claisen rearrangement, see: Grissom, J. W.; Klingberg, D.; Huang, D.; Slattery, B. J. J. Org. Chem. 1997, 62, 603.
  • 32
    • 68249156211 scopus 로고    scopus 로고
    • A thermal Claisen rearrangement of di(allyl) ethers followed by a Rh(I)-catalyzed intramolecular hydroacylation has been reported. See: Eilbracht, P.; Gersmeir, A.; Lennartz, D.; Huber, T. Synthesis 1995, 330.
    • A thermal Claisen rearrangement of di(allyl) ethers followed by a Rh(I)-catalyzed intramolecular hydroacylation has been reported. See: Eilbracht, P.; Gersmeir, A.; Lennartz, D.; Huber, T. Synthesis 1995, 330.
  • 33
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    • 2-catalyzed isomerization of allyl ethers, see: Mereyala, H. B.; Lingannagaru, S. R. Tetrahedron 1997, 53, 17501.
    • 2-catalyzed isomerization of allyl ethers, see: Mereyala, H. B.; Lingannagaru, S. R. Tetrahedron 1997, 53, 17501.
  • 34
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    • 2 furnished 4h with 15% ee. These results clearly indicate that the cationic Rh(I) complex indeed catalyzes the propargyl Claisen rearrangement.
    • 2 furnished 4h with 15% ee. These results clearly indicate that the cationic Rh(I) complex indeed catalyzes the propargyl Claisen rearrangement.
  • 38
    • 68249161640 scopus 로고    scopus 로고
    • Isolated crude 2a (ca. >90% purity) was indeed transformed into 3a in 72% isolated yield under the same conditions as entry 1, Table 3 [5 mol % Rh(I)-dppf, 80°C, 16 h].
    • Isolated crude 2a (ca. >90% purity) was indeed transformed into 3a in 72% isolated yield under the same conditions as entry 1, Table 3 [5 mol % Rh(I)-dppf, 80°C, 16 h].


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