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Volumn 8, Issue 26, 2006, Pages 5955-5958

First synthesis of biquinolizinium salts: Novel example of a chiral azonia dication

Author keywords

[No Author keywords available]

Indexed keywords

INORGANIC SALT; PALLADIUM; QUINAZOLINE DERIVATIVE;

EID: 33846121581     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol062314i     Document Type: Article
Times cited : (18)

References (39)
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    • Supramol. Chem., 1st ed.; Lehn, J. M., Ed.; VCH: Weinheim, Germany, 1995.
  • 10
    • 0037124885 scopus 로고    scopus 로고
    • For the use of BINAP ligands, see the Nobel lecture: Asymmetric catalysis: Science and opportunities. Noyori, R. Angew. Chem., Int. Ed. 2002, 41, 2008.
    • For the use of BINAP ligands, see the Nobel lecture: Asymmetric catalysis: Science and opportunities. Noyori, R. Angew. Chem., Int. Ed. 2002, 41, 2008.
  • 11
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    • The Viologens; Monk, P. S. M., Ed.; John Wiley: Canada, 1999.
    • (a) The Viologens; Monk, P. S. M., Ed.; John Wiley: Canada, 1999.
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    • Coe, B. J.; Harris, B. J.; Brunschwig, J. A.; Garin, B. S. W.; J.; Orduña, J. J. Am. Chem. Soc. 2005, 127, 3284.
    • (g) Coe, B. J.; Harris, B. J.; Brunschwig, J. A.; Garin, B. S. W.; J.; Orduña, J. J. Am. Chem. Soc. 2005, 127, 3284.
  • 20
    • 33846169837 scopus 로고    scopus 로고
    • For the most recent review, see: Ihmels, H. Quinolizinium Salts and Benzo Analogues in Science of Synthesis; Black, D., Ed.; Georg Thieme Verlag: Stuttgart, 2004; 15, pp 907-946.
    • For the most recent review, see: Ihmels, H. Quinolizinium Salts and Benzo Analogues in Science of Synthesis; Black, D., Ed.; Georg Thieme Verlag: Stuttgart, 2004; Vol. 15, pp 907-946.
  • 22
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    • For the only precedent of a bibenzoquinolizinium, see
    • For the only precedent of a bibenzoquinolizinium, see: Bradsher, C. K.; Yarrington, N. L. J. Org. Chem. 1963, 28, 78.
    • (1963) J. Org. Chem , vol.28 , pp. 78
    • Bradsher, C.K.1    Yarrington, N.L.2
  • 24
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    • (d) Percec, V.; Bae, J.-Y.; M., Zhao, M.; Hill, D. H. J. Org. Chem. 1995, 60, 176.
  • 38
    • 33846156941 scopus 로고    scopus 로고
    • Synthesis of 1-3. General Procedure. To a solution of the corresponding bromoquinoliziniun bromides 5-7 (100 mg, 0.346 mmol) and 10 mol, CuI (6.6 mg, 0.0346 mmol) in dry DMF (3 mL) under argon were added hexamethyldistannane (113.3 mg, 0.346 mmol) in dry DMF (2 mL) and Pd(PPh 3)4 (20.0 mg, 0.0173 mmol, and the reaction mixture was stirred at room temperature for 22 h. Next, the solution was concentrated under reduced pressure, and the residue was treated with 3 mL of EtOH (1 and 3) or THF (2, The solid was filtered and washed with ethanol (1 and 3) or EtOAc (2, Purification of the crude product by column chromatography on silica gel (reverse phase) using water as eluent yielded the corresponding biquinolizinium dibromides 1-3
    • 4 (20.0 mg, 0.0173 mmol), and the reaction mixture was stirred at room temperature for 22 h. Next, the solution was concentrated under reduced pressure, and the residue was treated with 3 mL of EtOH (1 and 3) or THF (2). The solid was filtered and washed with ethanol (1 and 3) or EtOAc (2). Purification of the crude product by column chromatography on silica gel (reverse phase) using water as eluent yielded the corresponding biquinolizinium dibromides 1-3.
  • 39
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