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Volumn 12, Issue 5, 2010, Pages 900-903

Stereoselective Synthesis of cis- And irans-2,3-Disubstituted Tetrahydrofurans via Oxonium-Prins Cyclization: Access to the Cordigol Ring System

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EID: 77749286121     PISSN: 15237060     EISSN: 15237052     Source Type: Journal    
DOI: 10.1021/ol9024259     Document Type: Article
Times cited : (72)

References (55)
  • 1
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    • For an excellent review, see: (a) Snider, B. B. In Comprehensive Organic Synthesis; Trost. B. M., Fleming. I., Heathcock, C. H., Eds.; Pergamon Press: New York. 1991: 2, pp 527-561. See also:
    • For an excellent review, see: (a) Snider, B. B. In Comprehensive Organic Synthesis; Trost. B. M., Fleming. I., Heathcock, C. H., Eds.; Pergamon Press: New York. 1991: Vol. 2, pp 527-561. See also:
  • 4
    • 0040744387 scopus 로고    scopus 로고
    • This classification was introduced by Oppolzer and Snieckus; see: (a) Oppolzer, W, Snieckus, V. Angew. Chem, Int. Ed. Engl. 1978, 17, 476. More recently, Mikami has proposed an alternative nomenclature; see
    • This classification was introduced by Oppolzer and Snieckus; see: (a) Oppolzer, W.; Snieckus, V. Angew. Chem., Int. Ed. Engl. 1978, 17, 476. More recently, Mikami has proposed an alternative nomenclature; see:
  • 7
    • 66449116154 scopus 로고    scopus 로고
    • For THP formation, see, e.g.: (a) Zhou, H.; Loh, T.-P. Tetrahedron Lett. 2009, 50, 4368.
    • For THP formation, see, e.g.: (a) Zhou, H.; Loh, T.-P. Tetrahedron Lett. 2009, 50, 4368.
  • 17
    • 77749257066 scopus 로고    scopus 로고
    • For THF formation, see, e.g.: (a) Ünaldi, S.; Özlügedik, M.; Fröhlich, R.; Hoppe, D. Adv. Synth. Catal. 2005, 347, 162.
    • For THF formation, see, e.g.: (a) Ünaldi, S.; Özlügedik, M.; Fröhlich, R.; Hoppe, D. Adv. Synth. Catal. 2005, 347, 162.
  • 34
    • 0034719252 scopus 로고    scopus 로고
    • Hanaki, N.; Link, J. T.; MacMillan, D. W. C.; Overman, L. E.; Trankle, W. G.; Wurster, J. A. Org. Lett. 2000, 2, 223. Note: These oxonium-Prins reactions give ring closure to a THP cation (cf. A, Scheme 1) which undergoes pinacol rearrangement to a THF final product.
    • (b) Hanaki, N.; Link, J. T.; MacMillan, D. W. C.; Overman, L. E.; Trankle, W. G.; Wurster, J. A. Org. Lett. 2000, 2, 223. Note: These oxonium-Prins reactions give ring closure to a THP cation (cf. A, Scheme 1) which undergoes pinacol rearrangement to a THF final product.
  • 39
    • 77749278802 scopus 로고    scopus 로고
    • Racemisation via various mechanisms can plague oxonium-Prins reactions involving homoallyic alcohols; see ref 5a and references cited therein
    • Racemisation via various mechanisms can plague oxonium-Prins reactions involving homoallyic alcohols; see ref 5a and references cited therein.
  • 41
    • 77749241550 scopus 로고    scopus 로고
    • TMSBr appears to serve as a bromide source (cf. ref 3e). Trace product formation occurred using only TMSBr as promoter.
    • TMSBr appears to serve as a bromide source (cf. ref 3e). Trace product formation occurred using only TMSBr as promoter.
  • 42
    • 77749257065 scopus 로고    scopus 로고
    • The isomeric ratios were unchanged after resubjection to the reaction conditions (Table 2, entry 7), suggesting the products are formed under kinetic control.
    • The isomeric ratios were unchanged after resubjection to the reaction conditions (Table 2, entry 7), suggesting the products are formed under kinetic control.
  • 43
    • 77749241548 scopus 로고    scopus 로고
    • 4, cf. Khurana, J. M.; Kumar, S.; Nand, B. Can. J. Chem. 2008, 86, 1052). The results were consistent with the assignments made by NOESY. For example, di-debromination of 5a and 5c gave the same products as mono-debromination of 4a/b and 4c, respectively (compounds 12 and 11, see the Supporting Information).
    • 4, cf. Khurana, J. M.; Kumar, S.; Nand, B. Can. J. Chem. 2008, 86, 1052). The results were consistent with the assignments made by NOESY. For example, di-debromination of 5a and 5c gave the same products as mono-debromination of 4a/b and 4c, respectively (compounds 12 and 11, see the Supporting Information).
  • 44
    • 77749278801 scopus 로고    scopus 로고
    • That these TSs are likely to be close in energy is consistent with our calculations on the formation of compound 10; see ref 21
    • That these TSs are likely to be close in energy is consistent with our calculations on the formation of compound 10; see ref 21.
  • 46
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    • For the isolation and characterization of cordigol, see
    • For the isolation and characterization of cordigol, see: Marston, A.; Zagorski, M. G.; Hostettmann, K. Helv. Chim. Acta 1988, 71, 1210.
    • (1988) Helv. Chim. Acta , vol.71 , pp. 1210
    • Marston, A.1    Zagorski, M.G.2    Hostettmann, K.3
  • 47
    • 44349096144 scopus 로고    scopus 로고
    • The same core ring system is also found in the Lophira lanceolata natural product lophirone H; see: Tih, R. G.; Sondengam, B. L.; Martin, M. T.; Bodo, B. Phytochemistry 1990, 29, 2289.
    • The same core ring system is also found in the Lophira lanceolata natural product lophirone H; see: Tih, R. G.; Sondengam, B. L.; Martin, M. T.; Bodo, B. Phytochemistry 1990, 29, 2289.
  • 48
    • 77749278803 scopus 로고    scopus 로고
    • 4 led to the formation of a mixture of compound 10 (40% yield) and a product tentatively assigned as that of intermolecular trapping by bromide (19% yield). This result is consistent with an oxonium-Prins pathway.
    • 4 led to the formation of a mixture of compound 10 (40% yield) and a product tentatively assigned as that of intermolecular trapping by bromide (19% yield). This result is consistent with an oxonium-Prins pathway.
  • 49
    • 0033601175 scopus 로고    scopus 로고
    • Related transformations have been used to form pyrano[2,3-c]benzopyrans; see: See: a
    • See: (a) Miyazaki, H.; Honda, K.; Asami, M.; Inoue, S. J. Org. Chem. 1999, 64, 9507. Related transformations have been used to form pyrano[2,3-c]benzopyrans; see:
    • (1999) J. Org. Chem , vol.64 , pp. 9507
    • Miyazaki, H.1    Honda, K.2    Asami, M.3    Inoue, S.4
  • 51
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    • Related transformations have been used to form pyrano[2,3-c]benzothiopyrans, see
    • Yadav, J. S.; Reddy, B. V. S.; Aruna, M.; Thomas, M. Synthesis 2002, 217. Related transformations have been used to form pyrano[2,3-c]benzothiopyrans, see:
    • (2002) Synthesis , pp. 217
    • Yadav, J.S.1    Reddy, B.V.S.2    Aruna, M.3    Thomas, M.4
  • 54
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    • For an excellent review of o-quinonemethide chemistry, see
    • For an excellent review of o-quinonemethide chemistry, see: Van. De Water, R. W.; Pettus, T. R. R. Tetrahedron 2002, 58, 5367.
    • (2002) Tetrahedron , vol.58 , pp. 5367
    • Van, D.1    Water, R.W.2    Pettus, T.R.R.3
  • 55
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    • trans
    • trans


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