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Volumn 131, Issue 11, 2009, Pages 4159-4166

Dinuclear Zn(II) complex promotes cleavage and isomerization of 2-hydroxypropyl alkyl phosphates by a common cyclic phosphate intermediate

Author keywords

[No Author keywords available]

Indexed keywords

ALKYLATION; CATALYSIS; GROUP TECHNOLOGY; ISOMERS; METHANOL; NUCLEAR MAGNETIC RESONANCE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PHOSPHATES; PROPANE; THERMODYNAMICS; ZINC; ZINC COMPOUNDS;

EID: 67849095713     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja900525t     Document Type: Article
Times cited : (30)

References (38)
  • 2
    • 21844455264 scopus 로고    scopus 로고
    • (b) Weston, J. Chem. Rev. 2005, 105, 2151.
    • (2005) Chem. Rev , vol.105 , pp. 2151
    • Weston, J.1
  • 14
    • 0037442328 scopus 로고    scopus 로고
    • While some of the dinuclear catalysts related to 4 show good activity for the cleavage of 1 in water, they fail to catalyze the opening of 2 in any reasonable time: see ref 2a and Iranzo, O, Kovalevsky, A. Y, Morrow, J. R, Richard, J. P. J. Am. Chem. Soc. 2003, 125, 1988
    • While some of the dinuclear catalysts related to 4 show good activity for the cleavage of 1 in water, they fail to catalyze the opening of 2 in any reasonable time: see ref 2a and Iranzo, O.; Kovalevsky, A. Y.; Morrow, J. R.; Richard, J. P. J. Am. Chem. Soc. 2003, 125, 1988.
  • 15
    • 41549119009 scopus 로고    scopus 로고
    • A di-Zn(II) complex operating in water has recently been shown to catalyze both the isomerization of 3'5'-UpU and its hydrolysis, with the latter being appreciably faster than the former: (a) Linjalahti, H.; Feng, G.; Mareque-Rivas, J. C.; Mikkola, S.; Williams, N. H. J. Am. Chem. Soc. 2008, 130, 4232.
    • A di-Zn(II) complex operating in water has recently been shown to catalyze both the isomerization of 3'5'-UpU and its hydrolysis, with the latter being appreciably faster than the former: (a) Linjalahti, H.; Feng, G.; Mareque-Rivas, J. C.; Mikkola, S.; Williams, N. H. J. Am. Chem. Soc. 2008, 130, 4232.
  • 16
    • 11844261429 scopus 로고    scopus 로고
    • H20 + 6.53.
    • H20 + 6.53.
  • 30
    • 37049042125 scopus 로고    scopus 로고
    • In the study reported in ref 12 the authors reported that the original Brown and Usher data for the hydroxide-promoted cleavage of a series of 2-hydroxypropyl aryl and alky phosphates exhibited some evidence for a break in the Brønsted plot, and for cleavage with good leaving groups the β1g value was -0.54. See: Brown, D. M, Usher, D. A. J. Chem. Soc. 1965, 6558
    • 1g value was -0.54. See: Brown, D. M.; Usher, D. A. J. Chem. Soc. 1965, 6558.
  • 33
    • 37049126372 scopus 로고    scopus 로고
    • 4-- bound between two Co(III) centers, it appears that two metal ions have the effect of a single proton. By extension, a single metal ion is predicted to have the effect of 1/2 a proton. See: Edwards, J. D.; Foong, S.-W.; Sykes, A. G. J. Chem. Soc., Dalton Trans. 1973, 829.
    • 4-- bound between two Co(III) centers, it appears that two metal ions have the effect of a single proton. By extension, a single metal ion is predicted to have the effect of 1/2 a proton. See: Edwards, J. D.; Foong, S.-W.; Sykes, A. G. J. Chem. Soc., Dalton Trans. 1973, 829.
  • 35
    • 33947461949 scopus 로고    scopus 로고
    • Kumamoto, J.; Cox, J. R., Jr.; Westheimer, F. H. J. Am. Chem. Soc. 1956, 78, 4858. The rate constant for methoxide reacting with 2 is 650 times slower than the reaction of hydroxide with ethylene phosphate. This is accounted for by a lower polarity medium effect where the alkoxide reaction with an anionic phosphate is 20-50 times slower than the hydroxide reaction in water, as well as a steric effect where the presence of the methyl group in 2 retards the reaction with methoxide.
    • Kumamoto, J.; Cox, J. R., Jr.; Westheimer, F. H. J. Am. Chem. Soc. 1956, 78, 4858. The rate constant for methoxide reacting with 2 is 650 times slower than the reaction of hydroxide with ethylene phosphate. This is accounted for by a lower polarity medium effect where the alkoxide reaction with an anionic phosphate is 20-50 times slower than the hydroxide reaction in water, as well as a steric effect where the presence of the methyl group in 2 retards the reaction with methoxide.


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