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Volumn 73, Issue 20, 2008, Pages 7871-7881

The proton complex of a diaza-macropentacycle: Structure, slow formation, and chirality induction by ion pairing with the optically active 1,1′-binaphthyl-2,2′-diyl phosphate anion C

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Indexed keywords

CHEMICAL REACTIONS;

EID: 53849109977     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo801438d     Document Type: Article
Times cited : (8)

References (73)
  • 50
    • 53849113536 scopus 로고    scopus 로고
    • Also sensitive to the medium (solvent, counteranion) are the chemical shifts of protons 3i and 5i
    • i.
  • 51
    • 53849099171 scopus 로고    scopus 로고
    • 2 φ-1.8cos φ- J = 0: Fraser, R. F.; Renaud, R. N.; Saunders, J. K.; Wigfield, Y. Y. Can. J. Chem. 1973, 51, 2433-2437.
    • 2 φ-1.8cos φ- J = 0: Fraser, R. F.; Renaud, R. N.; Saunders, J. K.; Wigfield, Y. Y. Can. J. Chem. 1973, 51, 2433-2437.
  • 55
    • 53849104166 scopus 로고    scopus 로고
    • The relationship ΔG†, RT c(22.96, ln(Tc/(Δν 2, 6J2)1/2) was used to estimate the activation energy (ΔG‡/kJmol-1) from the coalescence temperature (Tc/K, the frequency separation of the peaks (Δν/Hz, and the coupling constant (J/Hz) between the nuclei (ref 16c, The corresponding kc value is (π/2 1/2)(Δν2, 6J2)1/2. For the (αo,α′o) pair, Δν, 600 Hz and 2J, 16.7 Hz in C2D2Cl 4 at the low-temperature limit 300 K
    • 4 at the low-temperature limit (300 K).
  • 58
    • 53849148470 scopus 로고    scopus 로고
    • + must not be deshielded by strong intramolecular hydrogen bonding.
    • + must not be deshielded by strong intramolecular hydrogen bonding.
  • 59
    • 53849141379 scopus 로고    scopus 로고
    • This could result from preorganization of the exo site of o+o [1·H, for protonation to give o+o, 1·2H]2
    • 2+.
  • 64
    • 0043166541 scopus 로고    scopus 로고
    • 2O being 1.0; see: Lavison, G.; Thiébaut, D. Chirality 2003, 15, 630-636. Protonation goes through a single intermediate species that is in slow exchange with the final product, [1·H][(R)-(-)-BNP].
    • 2O being 1.0; see: Lavison, G.; Thiébaut, D. Chirality 2003, 15, 630-636. Protonation goes through a single intermediate species that is in slow exchange with the final product, [1·H][(R)-(-)-BNP].
  • 65
    • 53849114898 scopus 로고    scopus 로고
    • These crystals were extremely fragile and found not to be suitable for X-ray diffraction
    • These crystals were extremely fragile and found not to be suitable for X-ray diffraction.
  • 66
    • 53849138248 scopus 로고    scopus 로고
    • 2Ar) propellers.
    • 2Ar) propellers.
  • 69


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.