Destabilisation of a carbocation by α-oxygen substitution: the hydrolysis of orthocarbonates

作者: Pramod Kandanarachchi , Michael L. Sinnott

DOI: 10.1039/C39920000777

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摘要: Tetraphenyl orthocarbonate is hydrolysed by general acids 101-fold slower than triphenyl orthoformate, whilst tetrakis(p-methoxyphenyl) faster tetraphenyl orthocarbonate, with a Bronsted α-value closer to orthoformate indicating that cation stability, not an early transition state, the cause of lower rate orthocarbonate.

参考文章(15)
A Konstantinidis, M L Sinnott, The interaction of 1-fluoro-d-glucopyranosyl fluoride with glucosidases Biochemical Journal. ,vol. 279, pp. 587- 593 ,(1991) , 10.1042/BJ2790587
Martin L. Price, John Adams, C. Lagenaur, Eugene H. Cordes, Kinetics and mechanism for the hydrolysis of phenyl orthoformate Journal of Organic Chemistry. ,vol. 34, pp. 22- 25 ,(1969) , 10.1021/JO00838A007
Richard D. Chambers, Martin Salisbury, Glenn Apsey, Giovanni Moggi, Remarkably stable fluorinated conjugated cations and a di-cation Journal of The Chemical Society, Chemical Communications. pp. 680- 681 ,(1988) , 10.1039/C39880000680
Kenneth B. Wiberg, Structures and charge distributions in alkoxide ions Journal of the American Chemical Society. ,vol. 112, pp. 3379- 3385 ,(1990) , 10.1021/JA00165A019
Dion A. Stams, T. Darrah Thomas, Duncan C. MacLaren, De Ji, Thomas Hellman Morton, Empirical and ab initio estimates of the stabilities of fluorine-containing cations Journal of the American Chemical Society. ,vol. 112, pp. 1427- 1434 ,(1990) , 10.1021/JA00160A021
N. Narasimhamurthy, H. Manohar, Ashoka G. Samuelson, Jayaraman Chandrasekhar, Cumulative anomeric effect: a theoretical and x-ray diffraction study of orthocarbonates Journal of the American Chemical Society. ,vol. 112, pp. 2937- 2941 ,(1990) , 10.1021/JA00164A015
W. F. K. Wynne-Jones, Acid catalysis and equilibrium constants Transactions of The Faraday Society. ,vol. 34, pp. 245- 251 ,(1938) , 10.1039/TF9383400245
Helena Kovacs, Aatto Laaksonen, Molecular dynamics simulation and NMR study of water-acetonitrile mixtures Journal of the American Chemical Society. ,vol. 113, pp. 5596- 5605 ,(1991) , 10.1021/JA00015A013
J. N. Brönsted, W. F. K. Wynne-Jones, Acid catalysis in hydrolytic reactions Trans. Faraday Soc.. ,vol. 25, pp. 59- 76 ,(1929) , 10.1039/TF9292500059
E. H. Cordes, H. G. Bull, Mechanism and catalysis for hydrolysis of acetals, ketals, and ortho esters ChemInform. ,vol. 6, pp. 1- 44 ,(2002) , 10.1021/CR60291A004