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Volumn 127, Issue 10, 2005, Pages 3577-3588

Macrophomate synthase: QM/MM simulations address the Diels-Alder versus Michael-Aldol reaction mechanism

Author keywords

[No Author keywords available]

Indexed keywords

CARBOXYLATION; CATALYSIS; CHEMICAL BONDS; DEHYDRATION; DERIVATIVES; FUNGI; QUANTUM THEORY;

EID: 14944360652     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja043905b     Document Type: Article
Times cited : (112)

References (54)
  • 26
    • 36849122972 scopus 로고
    • Zwanzig, R. J. Chem. Phys. 1954, 22 (8), 1420-1426.
    • (1954) J. Chem. Phys. , vol.22 , Issue.8 , pp. 1420-1426
    • Zwanzig, R.1
  • 49
    • 14944370373 scopus 로고    scopus 로고
    • note
    • B3LYP/6-31+G(d) calculations were performed to study the reaction between 2-pyrone and the enolate of acetaldehyde. No Diels-Alder TS could be obtained using a larger basis set for this additional, simplified model. Initial configurations for the Diels-Alder TS were optimized to the Michael TS, with a single negative eigenvalue corresponding to the appropriate C-C bond-forming mechanism. The bicyclic intermediate for this model is no longer a stationary point at this level of calculation. Initial configurations for the bicyclic intermediate optimized to the Michael intermediate. The potential energy difference between the Michael TS and intermediate is 13.5 kcal/mol.
  • 50
    • 0037660093 scopus 로고    scopus 로고
    • Yale University: New Haven, CT
    • Tirado-Rives, J. Chop; Yale University: New Haven, CT, 2002.
    • (2002) Chop
    • Tirado-Rives, J.1
  • 54
    • 14944347793 scopus 로고    scopus 로고
    • Average values for the coordination distances were obtained with the Mok program (www.perlmol.org/pod/mok.html).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.