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Volumn , Issue 18, 2007, Pages 2829-2832

Michael addition of manganese enolates to nitroolefins

Author keywords

Enolates; Manganese; Michael addition; Nitroolefins; Selectivity

Indexed keywords

ALKENE DERIVATIVE; KETONE; MANGANESE; THIOUREA;

EID: 36649034501     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-991096     Document Type: Article
Times cited : (18)

References (29)
  • 3
    • 0036089366 scopus 로고    scopus 로고
    • For a comprehensive review of asymmetric Michael addition to nitroolefms, see
    • For a comprehensive review of asymmetric Michael addition to nitroolefms, see: Berner, O. M.; Tedeschi, L.; Enders, D. Eur. J. Org. Chem. 2002, 1877.
    • (2002) Eur. J. Org. Chem , pp. 1877
    • Berner, O.M.1    Tedeschi, L.2    Enders, D.3
  • 21
    • 0001258168 scopus 로고    scopus 로고
    • Bordwell, F. G.; Algrim, D. J.; Harrelson, J. A. Jr. J. Am. Chem. Soc. 1988, 110, 5903.
    • Bordwell, F. G.; Algrim, D. J.; Harrelson, J. A. Jr. J. Am. Chem. Soc. 1988, 110, 5903.
  • 27
    • 0004228346 scopus 로고
    • Brossi, A, Ed, Academic Press: New York, Chap. 6
    • (b) Numata, A.; Ibuka, T. In The Alkaloids, Vol. 31; Brossi, A., Ed.; Academic Press: New York, 1987, Chap. 6.
    • (1987) The Alkaloids , vol.31
    • Numata, A.1    Ibuka, T.2
  • 28
    • 36649036349 scopus 로고    scopus 로고
    • Betancort, J. M.; Barbas, C. F. III Org. Lett. 2001, 3, 3723.
    • Betancort, J. M.; Barbas, C. F. III Org. Lett. 2001, 3, 3723.
  • 29
    • 36649013436 scopus 로고    scopus 로고
    • General Procedure for the Preparation of Enolates via Manganese Enamides: To a suspension of LiBr (417 mg, 4.8 mmol) in freshly distilled THF (6 mL) in a 3-necked 25-mL round-bottomed flask under argon, MnBr 2 (516 mg, 2.4 mmol) was introduced and the solution was stirred until complete dissolution (transparent pale yellow solution, After addition of n-butylaniline (380 μL, 2.4 mmol) the temperature was cooled to -20°C and methyllithium (3 mL, 4.8 mmol) was introduced dropwise. On keeping the temperature under 0°C, the solution became limpid and red-dark colored after 10 min. The desired ketone (2 mmol) was then slowly added keeping the temperature between -10°C and 10°C. All the Mn enolates were formed in 30 min at this temperature. General Procedure for Michael Addition of Manganese Enolates to Nitroalkenes: The nitroalkenes (1.15 equiv) were added to the enolate solution at the required temperature without previous dissolution. The
    • 2 = 7.2 Hz, 1 H).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.