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Volumn , Issue 26, 2008, Pages 3043-3045

Asymmetric autocatalytic Mannich reaction in the presence of water and its implication in prebiotic chemistry

Author keywords

[No Author keywords available]

Indexed keywords

PREBIOTIC AGENT; WATER;

EID: 46149091526     PISSN: 13597345     EISSN: None     Source Type: Journal    
DOI: 10.1039/b804142n     Document Type: Article
Times cited : (47)

References (44)
  • 2
    • 0014447324 scopus 로고
    • Oxford University Press, Oxford
    • M. Calvin, Chemical Evolution, Oxford University Press, Oxford, 1969
    • (1969) Chemical Evolution
    • Calvin, M.1
  • 29
    • 46149104629 scopus 로고    scopus 로고
    • All reactions in aqueous media were performed in triplicate
    • All reactions in aqueous media were performed in triplicate
  • 34
    • 46149125639 scopus 로고    scopus 로고
    • Similar conditions in the presence of anionic surfactant such as sodium dodecylsulfate (SDS) produced only racemates For example reaction in NaCl (3.0 M) produced the syn- 3 with 44% ee. For discussion on the effects of added salts and their concentrations on reactivity in water see:
    • Similar conditions in the presence of anionic surfactant such as sodium dodecylsulfate (SDS) produced only racemates
  • 35
    • 3242699566 scopus 로고    scopus 로고
    • NMR analysis of the reaction mixture showed a significant equilibrium concentration of the imine 2
    • R. Breslow Acc. Chem. Res. 2004 37 471
    • (2004) Acc. Chem. Res. , vol.37 , pp. 471
    • Breslow, R.1
  • 38
    • 46149113578 scopus 로고    scopus 로고
    • One referee suggested the use of ethyl glyoxylate in excess to trap the p-anisidine. However, we were unable to observe any significant change in the selectivity The syn- 3 with 98% ee was let to stand in water at rt without any alteration of er or dr after three days. However, upon addition of p-anisidine, we observed isomerisation of syn- 3 into enantiopoor anti- 3, however, we were not able to assign the enantiomers
    • One referee suggested the use of ethyl glyoxylate in excess to trap the p-anisidine. However, we were unable to observe any significant change in the selectivity
  • 39
    • 46149119752 scopus 로고    scopus 로고
    • a = 6.95) isomerization of the anti-Mannich into syn-Mannich as reported by Barbas et al.
    • a = 6.95) isomerization of the anti-Mannich into syn-Mannich as reported by Barbas et al.
  • 41
    • 3042698496 scopus 로고    scopus 로고
    • A preliminary study showed that anti- 3, isolated from the reaction in DMF, catalyzed the formation of anti: syn- 3 (10: 9) mixture with no measurable selectivity. Work is currently under way to assess the catalytic effect of the enantiomerically pure anti- 3
    • D. E. Ward M. Sales P. J. Sasmal J. Org. Chem. 2004 69 4808
    • (2004) J. Org. Chem. , vol.69 , pp. 4808
    • Ward, D.E.1    Sales, M.2    Sasmal, P.J.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.