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Volumn 73, Issue 24, 2008, Pages 9627-9632

The endocyclic restriction test: The geometries of nucleophilic substitutions at sulfur(VI) and sulfur(II)

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL EQUATIONS; LEAVING GROUPS; NUCLEOPHILIC SUBSTITUTIONS; SULFUR TRANSFER REACTIONS; TRANSITION STATES; TRANSITION STRUCTURES;

EID: 58049198511     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo8016428     Document Type: Article
Times cited : (22)

References (37)
  • 11
    • 0001494424 scopus 로고    scopus 로고
    • For examples of linear free energy studies of sulfur substitution, see: (a) Wilson, J. M, Bayer, R. J, Hupe, D. J. J. Am. Chem. Soc. 1977, 99, 7922-7926
    • For examples of linear free energy studies of sulfur substitution, see: (a) Wilson, J. M.; Bayer, R. J.; Hupe, D. J. J. Am. Chem. Soc. 1977, 99, 7922-7926.
  • 17
    • 84962339125 scopus 로고    scopus 로고
    • For examples of calculations of sulfur substitutions, see: (a) Bachrach, S. M, Hayes, J. M, Dao, T, Mynar, J. L. Theor. Chem. Acc. 2002, 107, 266-271
    • For examples of calculations of sulfur substitutions, see: (a) Bachrach, S. M.; Hayes, J. M.; Dao, T.; Mynar, J. L. Theor. Chem. Acc. 2002, 107, 266-271.
  • 34
    • 0037773637 scopus 로고    scopus 로고
    • Lee, S. J.; Terrazas, M. S.; Pippel, D. J. J. Am. Chem. Soc. 2003, 125, 7307, and references cited therein for other cases using the endocyclic restriction test. The data from double-labeling experiments provide definitive distinctions between intermolecular and intramolecular pathways for these sulfur transfers. Assignments for the favored geometries for atom-transfer reactions under this test are conclusive and independent of yields. Low yields of the atom-transferred products or the operation of pathways which give other products do not compromise the test under this protocol.
    • Lee, S. J.; Terrazas, M. S.; Pippel, D. J. J. Am. Chem. Soc. 2003, 125, 7307, and references cited therein for other cases using the endocyclic restriction test. The data from double-labeling experiments provide definitive distinctions between intermolecular and intramolecular pathways for these sulfur transfers. Assignments for the favored geometries for atom-transfer reactions under this test are conclusive and independent of yields. Low yields of the atom-transferred products or the operation of pathways which give other products do not compromise the test under this protocol.
  • 35
    • 58049194656 scopus 로고    scopus 로고
    • n had tended to rearrange prior to mixing with 8. Careful purification of each component and analysis was carried out to show this did not occur prior to the reaction. The fact that there was not scrambling of the labels in the conversion of 7 to 9 under the same conditions establishes that label scrambling prior to phenyl sulfonyl transfer is not occurring in this case.
    • n had tended to rearrange prior to mixing with 8. Careful purification of each component and analysis was carried out to show this did not occur prior to the reaction. The fact that there was not scrambling of the labels in the conversion of 7 to 9 under the same conditions establishes that label scrambling prior to phenyl sulfonyl transfer is not occurring in this case.
  • 36
    • 58049210870 scopus 로고    scopus 로고
    • Our efforts to investigate a long-chain tether for sulfur(II) by the investigation of i were not successful (Jarboe, S. Ph.D. Thesis, University of Illinois, 2002, Absent the experimental results for that case, it could be argued that there is insufficient dilution in these experiments for a definitive conclusion. Our preference, consistent with previous work, is to favor a linear transition structure.8a Chemical Equation Presented
    • 8a (Chemical Equation Presented)


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.