Polyhydroxylated sapphyrins: multisite non-metallic catalysts for activated phosphodiester hydrolysis.
Kral, V. ; Lang, K.; Kralova, J. etc.,
Journal of the American Chemical Society, 128  432 - 437 (2006)
Enhanced hydrolysis rates for the cleavage of bis(4-nitrophenyl)phosphate (BNPP), a model phosphodiester, may be achieved by using appropriately designed ditopic receptors containing the known phosphate-binding nucleus, sapphyrin, attached covalently to suitably oriented polyhydroxyl subunits. Evidence for the interaction between sapphyrin and BNPP comes from solid-state X-ray diffraction analysis of a diprotonated dihydroxylated sapphyrin-BNPP complex and from solution-phase P-31 NMR spectroscopic binding studies. The sapphyrins described in this paper may have a role to play as oligonucleotide cleavage agents.