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Volumn 64, Issue 13, 1999, Pages 4596-4606

Origins of stereoselectivity in the Corey-Chaykovsky reaction. Insights from quantum chemistry

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; CHIRALITY; EPOXIDATION; NUCLEAR MAGNETIC RESONANCE; QUANTUM CHEMISTRY; REACTION ANALYSIS; STEREOCHEMISTRY; STEREOISOMERISM; X RAY DIFFRACTION;

EID: 0033603506     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo9818935     Document Type: Article
Times cited : (36)

References (34)
  • 11
    • 84962335564 scopus 로고    scopus 로고
    • note
    • Although the term oxathietane implies a S-O bond, there is controversy about the nature of this bond (see ref 7 and the references cited therein), and a weakly bonded situation has been suggested. Our computational results are consistent with such interpretation, and we prefer the term S-O interaction.
  • 21
    • 84962362676 scopus 로고    scopus 로고
    • note
    • 2.
  • 23
    • 84962348792 scopus 로고    scopus 로고
    • note
    • The S-O distance in 4, 2.2 Å at the B3LYP/6-31+G* level, is relatively large for a covalent bond. Furthermore, the electron density between S and O is much lower than in the covalent bonds in 4, as revealed by examination of electron density isosurfaces.
  • 24
    • 84962348801 scopus 로고    scopus 로고
    • note
    • The necessary stationary points of the model reaction were redetermined at this lower level of theory for the purpose of concistency.
  • 27
    • 84962355379 scopus 로고    scopus 로고
    • note
    • Several freezing strategies were tested in an effort to use PM3, but this approach was found unreliable.
  • 29
    • 84962411899 scopus 로고    scopus 로고
    • note
    • However, the solvation effect is 9 kcal/mol for 8 and 3 kcal/mol for 5, suggesting that 8 could be even more favored if optimization in solution had been available.
  • 31
    • 84962444331 scopus 로고    scopus 로고
    • note
    • A counterion would probably be present in typical applications of sulfonium methylides, lowering the energy of the starting materials. (29) They are stationary points at the HF/6-31G* level, as discussed in Results.
  • 33
    • 84962453309 scopus 로고    scopus 로고
    • note
    • Attempts to locate substituted version of B corresponding to trans-stilbene oxide formation at the HF/6-31G* level of theory were unsuccessful.
  • 34
    • 84962447491 scopus 로고    scopus 로고
    • note
    • ar (ylide) torsional angle is defined by the carbon atoms in dark.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.