메뉴 건너뛰기




Volumn 132, Issue 15, 2010, Pages 5364-5374

Synthesis, structure, spirocyclization mechanism, and glutathione peroxidase-like antioxidant activity of stable spirodiazaselenurane and spirodiazatellurane

Author keywords

[No Author keywords available]

Indexed keywords

ABSOLUTE CONFIGURATION; ANTIOXIDANT ACTIVITIES; APICAL POSITIONS; CARBON ATOMS; CHIRAL RESOLUTIONS; EQUATORIAL POSITIONS; FAST OXIDATION; GLUTATHIONE PEROXIDASE; GPX MIMIC; LONE PAIR; MECHANISTIC STUDIES; NITROGEN ATOM; REDOX CYCLES; SELENIDES; SINGLE CRYSTAL X-RAY ANALYSIS; SPIRO COMPOUNDS; SPIROCYCLIZATION; X RAY CRYSTAL STRUCTURES;

EID: 77951084422     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja908080u     Document Type: Article
Times cited : (153)

References (97)
  • 3
    • 0000871996 scopus 로고
    • Martin, J. C. Science 1983, 221, 509-514
    • (1983) Science , vol.221 , pp. 509-514
    • Martin, J.C.1
  • 17
    • 39749099296 scopus 로고    scopus 로고
    • references therein
    • Allenmark, S. Chirality 2008, 20, 544-551, and references therein
    • (2008) Chirality , vol.20 , pp. 544-551
    • Allenmark, S.1
  • 47
    • 77951064743 scopus 로고    scopus 로고
    • For excellent articles on Se⋯X (X = N, O, Cl, Br, F, etc.) interactions, see
    • For excellent articles on Se⋯X (X = N, O, Cl, Br, F, etc.) interactions, see:.
  • 64
    • 77951051915 scopus 로고    scopus 로고
    • The aerial oxidation of the telluride 21 to spirodiazatellurane (25) is not surprising, as the aerial oxidation of certain tellurides to spirodioxytellurane is well documented in the literature. For details, see ref 2a
    • The aerial oxidation of the telluride 21 to spirodiazatellurane (25) is not surprising, as the aerial oxidation of certain tellurides to spirodioxytellurane is well documented in the literature. For details, see ref 2a.
  • 66
    • 77951034890 scopus 로고    scopus 로고
    • 125Te NMR in the presence of chiral shift reagent indicated the presence of two enantiomers (Figure S31, Supporting Information)
    • 125Te NMR in the presence of chiral shift reagent indicated the presence of two enantiomers (Figure S31, Supporting Information).
  • 67
    • 23844514740 scopus 로고    scopus 로고
    • references therein
    • Sarma, B. K. and Mugesh, G. J. Am. Chem. Soc. 2005, 127, 11477-11485, and references therein
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 11477-11485
    • Sarma, B.K.1    Mugesh, G.2
  • 76
    • 77951075363 scopus 로고    scopus 로고
    • It should be noted that in the case of tellurium one more intermediate (23INT2b) was observed between the first intermediate (23INT1) and the stable intermediate having N-Se-OH ≈ 180° (23INT3b) (Table 2). However, this intermediate (23INT2b) converts to 23INT3b via transition state 23TS3b, having no activation energy barrier. Therefore, it is not surprising that we have not observed any such intermediates in the case of sulfur and selenium.
    • It should be noted that in the case of tellurium one more intermediate (23INT2b) was observed between the first intermediate (23INT1) and the stable intermediate having N-Se-OH ≈ 180° (23INT3b) (Table 2). However, this intermediate (23INT2b) converts to 23INT3b via transition state 23TS3b, having no activation energy barrier. Therefore, it is not surprising that we have not observed any such intermediates in the case of sulfur and selenium.
  • 77
    • 77951072430 scopus 로고    scopus 로고
    • 2 O failed, and every time the transition state optimization converged to the transition state 23TS3a of pathway (a) water elimination was involved. Further, we observed that 23INT3b converts to 23INT2a via transition state 23TS4b. This indicates that pathway (b) merges with pathway (a) and pathway (a) is the one that leads to the formation of a spiro compound.
    • 2 O failed, and every time the transition state optimization converged to the transition state 23TS3a of pathway (a) water elimination was involved. Further, we observed that 23INT3b converts to 23INT2a via transition state 23TS4b. This indicates that pathway (b) merges with pathway (a) and pathway (a) is the one that leads to the formation of a spiro compound.
  • 84
    • 77951051913 scopus 로고    scopus 로고
    • 1/2 for 24 (62 h) as compared to that of 20 (88 h) is not because of the regeneration of 24 in the catalytic cycle, but is due to the initial ∼20% conversion of BnSH to BnSSBn, which arises from the direct reaction of BnSH with 24 during the first ∼140 min
    • 1/2 for 24 (62 h) as compared to that of 20 (88 h) is not because of the regeneration of 24 in the catalytic cycle, but is due to the initial ∼20% conversion of BnSH to BnSSBn, which arises from the direct reaction of BnSH with 24 during the first ∼140 min.
  • 88
    • 84961979145 scopus 로고    scopus 로고
    • It should be noted that the tellurium analogue of ebselen (ebtellur) is not known, although ebtellur has been used as a model compound for computational studies to understand the reactivity of organotellurium compounds toward reactive oxygen species such as peroxynitrite. Therefore, the spiro analogue of ebtellur (25) may help clarify the effect of tellurium substitution in cyclic selenazole-based compounds. For theoretical studies on ebtellur and related compounds, see
    • It should be noted that the tellurium analogue of ebselen (ebtellur) is not known, although ebtellur has been used as a model compound for computational studies to understand the reactivity of organotellurium compounds toward reactive oxygen species such as peroxynitrite. Therefore, the spiro analogue of ebtellur (25) may help clarify the effect of tellurium substitution in cyclic selenazole-based compounds. For theoretical studies on ebtellur and related compounds, see: Sakimoto, Y., Hirao, K., and Musaev, D. G. J. Phys. Chem. A 2003, 107, 5631-5639
    • (2003) J. Phys. Chem. A , vol.107 , pp. 5631-5639
    • Sakimoto, Y.1    Hirao, K.2    Musaev, D.G.3
  • 92
    • 15744375697 scopus 로고    scopus 로고
    • Gaussian, Inc.: Wallingford, CT,. The full reference is given in the Supporting Information
    • Gaussian 03, Revision C.02; Gaussian, Inc.: Wallingford, CT, 2004. The full reference is given in the Supporting Information.
    • (2004) Gaussian 03, Revision C.02
  • 94
    • 0003591868 scopus 로고    scopus 로고
    • Bruker AXS: Madison, WI
    • SMART, Version 5.05; Bruker AXS: Madison, WI, 1998.
    • (1998) SMART, Version 5.05


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.