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Volumn 7, Issue 26, 2005, Pages 5793-5796

A new entry to the synthesis of 2,3-disubstituted indoles

Author keywords

[No Author keywords available]

Indexed keywords

ALKENE; INDOLE ALKALOID; INDOLE DERIVATIVE; INDOMETACIN;

EID: 30144432668     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol052179u     Document Type: Article
Times cited : (52)

References (56)
  • 1
    • 0003979828 scopus 로고    scopus 로고
    • Academic Press: London
    • (a) Sundberg, R. J. Indoles; Academic Press: London, 1996.
    • (1996) Indoles
    • Sundberg, R.J.1
  • 3
    • 33751532464 scopus 로고    scopus 로고
    • Thomas, E. J., Ed.; Thieme: Stuttgart
    • (a) Joule, J. A. In Science of Synthesis; Thomas, E. J., Ed.; Thieme: Stuttgart, 2000; Vol. 10.
    • (2000) Science of Synthesis , vol.10
    • Joule, J.A.1
  • 7
    • 0003989782 scopus 로고    scopus 로고
    • Addison-Wesley Longman Limited: Singapore
    • (b) Gilchrist, T. L. Heterocyclic Chemistry; Addison-Wesley Longman Limited: Singapore, 1997.
    • (1997) Heterocyclic Chemistry
    • Gilchrist, T.L.1
  • 40
    • 13844272578 scopus 로고    scopus 로고
    • and references therein
    • (m) Ackermann, L. Org. Lett. 2005, 7, 439-442 and references therein.
    • (2005) Org. Lett. , vol.7 , pp. 439-442
    • Ackermann, L.1
  • 41
    • 1642339008 scopus 로고    scopus 로고
    • Upon treatment with NaH at room temperature, N-(tert-butoxycatbonyl)-2- (1-phenylsulfonylpropa-1,2-dien-1-yl)aniline underwent the endomode ring-closing reaction to furnish the corresponding indole derivative in a high yield. Mukai, C.; Kobayashi, M.; Kubota, S.; Takahashi, Y.; Kitagaki, S. J. Org. Chem. 2004, 69, 2128-2136.
    • (2004) J. Org. Chem. , vol.69 , pp. 2128-2136
    • Mukai, C.1    Kobayashi, M.2    Kubota, S.3    Takahashi, Y.4    Kitagaki, S.5
  • 44
    • 30144436311 scopus 로고    scopus 로고
    • note
    • 3-position, which must be useful for further elaborations such as the carbon homologation reaction, if the reaction proceeded as planned.
  • 45
    • 0000356370 scopus 로고
    • All allenes used in this study were prepared by the method of Marshall, see: (a) Marshall, J. A.; Wang, X.-j. J. Org. Chem. 1992, 57, 1242-1252.
    • (1992) J. Org. Chem. , vol.57 , pp. 1242-1252
    • Marshall, J.A.1    Wang, X.-J.2
  • 48
    • 30144440717 scopus 로고    scopus 로고
    • note
    • 3.
  • 49
    • 30144438859 scopus 로고    scopus 로고
    • note
    • When 10 equiv of LiCl was added to the reaction mixture (3.5 h at room temperature), 3a was obtained in 67% yield as the sole product.
  • 50
    • 30144440561 scopus 로고    scopus 로고
    • note
    • When N-acetyl-2-iodoaniline was exposed to conditions A or B, the corresponding allenyl derivative or indole derivative was selectively formed in the respective yields of 80% and 70%, although a higher reaction temperature (50°C) was necessary under conditions A.
  • 51
    • 30144436737 scopus 로고    scopus 로고
    • note
    • 3 effected the ring-closing reaction to produce the N-acetyl congener of 3a in 49% yield.
  • 52
    • 30144438532 scopus 로고    scopus 로고
    • note
    • Compound 4a could be converted into 1-(terf-butoxycarbonyl)-3- hydroxymethyl-2-methylindole (desilylated-3a) in 66% yield by exposure to TBAF.
  • 53
    • 30144437546 scopus 로고    scopus 로고
    • note
    • The use of TBAF in place of TBAC in the palladium-catalyzed coupling reaction (conditions B) was unfortunately found to be fruitless.
  • 56
    • 30144434436 scopus 로고    scopus 로고
    • note
    • Prepared by the condensation of 2-iodo-4-methoxyaniline with 4-chlorobenzoyl chloride in 81% yield under the conventional conditions.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.