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Volumn 74, Issue 16, 2009, Pages 6190-6198

Decarboxylative ketone aldol reactions: Development and mechanistic evaluation under metal-free conditions

Author keywords

[No Author keywords available]

Indexed keywords

ACIDS; ADDITION REACTIONS; ALDEHYDES; CARBOXYLATION; CARBOXYLIC ACIDS; KETONES; SPECTROSCOPIC ANALYSIS; SYNTHESIS (CHEMICAL);

EID: 70349144936     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo901022j     Document Type: Article
Times cited : (74)

References (51)
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    • For reviews on polyketide biosynthesis, see: (a)
    • For reviews on polyketide biosynthesis, see: (a) Smith, S.; Tsai, S.-C. Nat. Prod. Rep. 2007, 24, 1041.
    • (2007) Nat. Prod. Rep. , vol.24 , pp. 1041
    • Smith, S.1    Tsai, S.-C.2
  • 6
    • 0022548531 scopus 로고
    • For references containing evidence supporting a concerted mechanism, see: (a)
    • For references containing evidence supporting a concerted mechanism, see: (a) Cane, D. E.; Liang, T.-C.; Taylor, P. B.; Chang, C.; Yang, C.-C. J. Am. Chem. Soc. 1986, 108, 4957.
    • (1986) J. Am. Chem. Soc. , vol.108 , pp. 4957
    • Cane, D.E.1    Liang, T.-C.2    Taylor, P.B.3    Chang, C.4    Yang, C.-C.5
  • 11
    • 0017716628 scopus 로고
    • For references that bring additional insight to the accepted concerted mechanism, see: (f)
    • For references that bring additional insight to the accepted concerted mechanism, see: (f) Kresze, G.-B.; Steber, L.; Oesterhelt, D.; Lynen, F. Eur. J. Biochem. 1977, 79, 191.
    • (1977) Eur. J. Biochem. , vol.79 , pp. 191
    • Kresze, G.-B.1    Steber, L.2    Oesterhelt, D.3    Lynen, F.4
  • 13
    • 0034651317 scopus 로고    scopus 로고
    • For references containing evidence supporting a stepwise decarboxylation- addition mechanism, see: (a)
    • For references containing evidence supporting a stepwise decarboxylation- addition mechanism, see: (a) Davies, C.; Heath, R. J.; White, S. W.; Rock, C. O. Structure 2000, 8, 185.
    • (2000) Structure , vol.8 , pp. 185
    • Davies, C.1    Heath, R.J.2    White, S.W.3    Rock, C.O.4
  • 22
    • 0017373767 scopus 로고
    • For references containing evidence supporting a stepwise addition-decarboxylation mechanism, see: (a)
    • For references containing evidence supporting a stepwise addition-decarboxylation mechanism, see: (a) Sedgwick, B.; Cornforth, J. W. Eur. J. Biochem. 1977, 75, 465.
    • (1977) Eur. J. Biochem. , vol.75 , pp. 465
    • Sedgwick, B.1    Cornforth, J.W.2
  • 29
    • 0000699983 scopus 로고    scopus 로고
    • Jacobsen, E. N., Pfaltz, A., Yamammoto, H., Eds.; Springer: Heidelberg, Germany
    • (e) Carreira, E. M. In Comprehensive Asymmetric Catalysis; Jacobsen, E. N., Pfaltz, A., Yamammoto, H., Eds.; Springer: Heidelberg, Germany; 1999; Vol.3, p 997.
    • (1999) Comprehensive Asymmetric Catalysis , vol.3 , pp. 997
    • Carreira, E.M.1
  • 31
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    • For examples of decarboxylative Claisen condensations, see: (a)
    • For examples of decarboxylative Claisen condensations, see: (a) Scott, A. I.; Wiesner, C. J.; Yoo, S.; Chung, S.-K. J. Am. Chem. Soc. 1975, 97, 6277.
    • (1975) J. Am. Chem. Soc. , vol.97 , pp. 6277
    • Scott, A.I.1    Wiesner, C.J.2    Yoo, S.3    Chung, S.-K.4
  • 36
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    • For examples of decarboxylative Knoevenagel condensations, see: (a)
    • For examples of decarboxylative Knoevenagel condensations, see: (a) Galat, A. J. Am. Chem. Soc. 1946, 68, 376.
    • (1946) J. Am. Chem. Soc. , vol.68 , pp. 376
    • Galat, A.1
  • 46
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    • note
    • Nonaromatic esters were generally incompatible with the reaction, with only trace amounts of product being observed with malonic acid half ethyl and half tert-butyl esters by NMR.
  • 47
    • 0000673856 scopus 로고
    • This technique is an effective two-dimensional spectroscopic method that permits spectroscopic separation of crude reaction components in a complex mixture according to diffusion constants that depend on variations in size and charge. By extracting horizontal traces from points along the diffusion axis corresponding to the reaction components for a reaction between MAHO 3 (or MAHT 2) and ethyl pyruvate, structural elucidation of the different species present in the reaction mixture may be achieved
    • Morris, K. F.; Johnson, C. S. Jr. J. Am. Chem. Soc. 1993, 115, 4291. This technique is an effective two-dimensional spectroscopic method that permits spectroscopic separation of crude reaction components in a complex mixture according to diffusion constants that depend on variations in size and charge. By extracting horizontal traces from points along the diffusion axis corresponding to the reaction components for a reaction between MAHO 3 (or MAHT 2) and ethyl pyruvate, structural elucidation of the different species present in the reaction mixture may be achieved.
    • (1993) J. Am. Chem. Soc. , vol.115 , pp. 4291
    • Morris, K.F.1    Johnson Jr., C.S.2
  • 48
    • 84924280032 scopus 로고    scopus 로고
    • note
    • 1H NMR spectrum of MAHO 3 from the DOSY spectrum difficult.
  • 49
    • 84924267403 scopus 로고    scopus 로고
    • See the Supporting Information
    • See the Supporting Information.
  • 51
    • 84924232032 scopus 로고    scopus 로고
    • Two equivalents of MAHO 3 were used to maximize product yield
    • Two equivalents of MAHO 3 were used to maximize product yield.


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