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Volumn 76, Issue 9, 2011, Pages 3296-3305

Asymmetric synthesis of pyrrolo[2,1-a]isoquinoline derivatives by 1,3-dipolar cycloadditions of stabilized isoquinolinium N-ylides with sulfinyl dipolarophiles

Author keywords

[No Author keywords available]

Indexed keywords

ANTI-CONFORMATIONS; ASYMMETRIC SYNTHESIS; AZOMETHINE YLIDES; DIPOLAR CYCLOADDITIONS; DIPOLAROPHILES; ENANTIOPURE; FACIAL SELECTIVITY; ISOQUINOLINES; SULFINYL GROUP;

EID: 79955557380     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo200191c     Document Type: Article
Times cited : (42)

References (80)
  • 1
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    • For a general review on pyrrolo[2,1- a ]isoquinolines, see:;, For some recent examples of synthesis of this system, see:; J. Org. Chem. 2010, 75, 6252-6262
    • For a general review on pyrrolo[2,1- a ]isoquinolines, see: Mikhailovskii, A. G.; Shklyaev, V. S. Chem. Heterocycl. Compd. 1997, 33, 243-265 For some recent examples of synthesis of this system, see: Adams, H.; Elsunaki, T. M.; Ojea-Jiménez, I.; Jones, S.; Meijer, A. J. H. M. J. Org. Chem. 2010, 75, 6252-6262
    • (1997) Chem. Heterocycl. Compd. , vol.33 , pp. 243-265
    • Mikhailovskii, A.G.1    Shklyaev, V.S.2    Adams, H.3    Elsunaki, T.M.4    Ojea-Jiménez, I.5    Jones, S.6    Meijer, A.J.H.M.7
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    • references therein
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    • Stanley, L.M.1    Sibi, M.P.2
  • 42
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    • The only reported examples on asymmetric [3 + 2] cycloaddition of azomethine ylides to vinyl sulfoxides are described in refs 11 and 12 as well as in the following ones dealing with the reactions of vinylsulfoxides with 3-oxidopyridium betaine to afford tropanes
    • The only reported examples on asymmetric [3 + 2] cycloaddition of azomethine ylides to vinyl sulfoxides are described in refs 11 and 12 as well as in the following ones dealing with the reactions of vinylsulfoxides with 3-oxidopyridium betaine to afford tropanes: Takahashi, T.; Kitano, K.; Hagi, H.; Nihonmatsu, H.; Koizumi, T. Chem. Lett. 1989, 597
    • (1989) Chem. Lett. , pp. 597
    • Takahashi, T.1    Kitano, K.2    Hagi, H.3    Nihonmatsu, H.4    Koizumi, T.5
  • 46
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    • These features had also been reported for reactions of vinyl sulfoxides with other dipoles such as diazoalkanes
    • These features had also been reported for reactions of vinyl sulfoxides with other dipoles such as diazoalkanes: García Ruano, J. L.; Fraile, A.; Martín, M. R. Tetrahedron: Asymmetry 1996, 7, 1943
    • (1996) Tetrahedron: Asymmetry , vol.7 , pp. 1943
    • García Ruano, J.L.1    Fraile, A.2    Martín, M.R.3
  • 56
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    • For nonasymmetric cycloadditions of these dipoles (less studied than those of azomethine ylides derived from α-amino esters), see
    • For nonasymmetric cycloadditions of these dipoles (less studied than those of azomethine ylides derived from α-amino esters), see: Tsuge, O.; Kanemasa, S.; Takenaka, S. Bull. Chem. Soc. Jpn. 1985, 58, 3137-3157
    • (1985) Bull. Chem. Soc. Jpn. , vol.58 , pp. 3137-3157
    • Tsuge, O.1    Kanemasa, S.2    Takenaka, S.3
  • 66
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    • It was available from furfural according to the procedure previously described
    • It was available from furfural according to the procedure previously described: Schenck, G. O. Liebigs Ann. 1953, 584, 156-176
    • (1953) Liebigs Ann. , vol.584 , pp. 156-176
    • Schenck, G.O.1
  • 67
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    • note
    • 2 t -Bu) group with respect to the dihydropyridine (for 1-HBr) or tetrahydropyridine (for 2-HBr) moieties at the pyrrolidine ring formed in the reactions from azomethine ylide. They are related to the endo and exo addition modes of dipole, using as a reference the nitrile group at the dipolarophile.
  • 69
    • 79955569795 scopus 로고    scopus 로고
    • note
    • Compound 12 is also obtained from endo-9 upon standing for several weeks in the refrigerator.
  • 70
    • 79955558451 scopus 로고    scopus 로고
    • note
    • Dipolarophile 6 did not react with stabilized thiazolium N -ylide.
  • 71
    • 79955564907 scopus 로고    scopus 로고
    • note
    • When the ester group is located at C-2, the δ value is 1.39-1.50 ppm, whereas when it is positioned at C-1 and adopts a trans arrangement with respect to H-10b, the δ value is 1.08-1.12 ppm.
  • 73
    • 79955569546 scopus 로고    scopus 로고
    • note
    • Therefore, the adducts with H-3 and H-10b in a trans arrangement were formed predominantly.
  • 74
    • 79955555370 scopus 로고    scopus 로고
    • CCDC809008 contains the supplementary crystallographic data for endo - 17. These data can be obtained free of charge via or by emailing data-request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223.
    • CCDC809008 contains the supplementary crystallographic data for endo-17. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data-request/ cif or by emailing data-request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223.
  • 75
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    • note
    • Attractive interaction between the electron-withdrawing substituent at the dipolarophile and the heteroaromatic ring of the ylide has been proposed by other authors; see ref 16a.
  • 76
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    • The syn or anti character of these adducts is indicative of the cis or trans relationship between H-3 and H-3a, respectively. It is related to the face of the dipolarophile where the dipole approaches, taking as a reference the spatial arrangement of the alkoxy group (for this nomenclature, see
    • The syn or anti character of these adducts is indicative of the cis or trans relationship between H-3 and H-3a, respectively. It is related to the face of the dipolarophile where the dipole approaches, taking as a reference the spatial arrangement of the alkoxy group (for this nomenclature, see: Keller, E.; de Lange, B.; Rispens, M. T.; Feringa, B. L. Tetrahedron 1993, 49, 8899
    • (1993) Tetrahedron , vol.49 , pp. 8899
    • Keller, E.1    De Lange, B.2    Rispens, M.T.3    Feringa, B.L.4
  • 77
    • 2442609914 scopus 로고    scopus 로고
    • Thus, syn-adducts result from the approach of dipole to the face where the OEt group is positioned, whereas the anti-adducts are obtained by approach to the opposite face. The endo or exo terms indicate, respectively, the cis or trans arrangement adopted by furanone and dihydropyridine moieties at the pyrrolidine ring formed in the reactions from azomethine ylide. They are related to the endo and exo addition modes of dipole, using as a reference the carbonyl group at the furanone ring.
    • Trost, B. M.; Crawley, M. L. Chem. - Eur. J. 2004, 10, 2237). Thus, syn-adducts result from the approach of dipole to the face where the OEt group is positioned, whereas the anti-adducts are obtained by approach to the opposite face. The endo or exo terms indicate, respectively, the cis or trans arrangement adopted by furanone and dihydropyridine moieties at the pyrrolidine ring formed in the reactions from azomethine ylide. They are related to the endo and exo addition modes of dipole, using as a reference the carbonyl group at the furanone ring.
    • (2004) Chem. - Eur. J. , vol.10 , pp. 2237
    • Trost, B.M.1    Crawley, M.L.2
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    • note
    • It is noteworthy that compound 8 did not react with thiazolium ylide (see ref 12).
  • 79
    • 79955553911 scopus 로고    scopus 로고
    • CCDC809009, CCDC809010, and CCDC809011 contain the supplementary crystallographic data for anti - endo - 21a, anti - endo - 21b, and syn - endo - 21a, respectively. These data can be obtained free of charge via, or by emailing data-request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223.
    • CCDC809009, CCDC809010, and CCDC809011 contain the supplementary crystallographic data for anti-endo-21a, anti-endo-21b, and syn-endo-21a, respectively. These data can be obtained free of charge via www.ccdc.cam.ac.uk/ data-request/cif, or by emailing data-request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223.
  • 80
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    • note
    • The reactions of ylide 1 with sulfinylfuranones 7 were assayed in different solvents. Unfortunately, the reaction mixtures obtained in less polar solvent than acetonitrile (toluene or dichloromethane) were complex and any certain conclusion can be inferred.


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