Activating Water: Important Effects of Non-leaving Groups on the Hydrolysis of Phosphate Triesters
作者:Anthony J. Kirby、Michelle Medeiros、Pedro S. M. Oliveira、Elisa S. Orth、Tiago A. S. Brandão、Eduardo H. Wanderlind、Almahdi Amer、Nicholas H. Williams、Faruk Nome
DOI:10.1002/chem.201101926
日期:2011.12.23
spontaneous hydrolysis of tris‐2‐pyridyl phosphate (TPP) is explained by the activating effects of the non‐leaving (“spectator”) groups on POAr cleavage, and not by intramolecular catalysis. Previous work on phosphate‐transfer reactions has concentrated on the contributions to reactivity of the nucleophile and the leavinggroup, but our results make clear that the effects of the non‐leavinggroups on phosphorus
Activating Water: Efficient Intramolecular General Base Catalysis of the Hydrolysis of a Phosphate Triester
作者:Anthony J. Kirby、Michelle Medeiros、Pedro S. M. Oliveira、Tiago A. S. Brandão、Faruk Nome
DOI:10.1002/chem.200901096
日期:2009.8.24
We have identified the first highly efficient intramolecular general base catalysis (IGBC) of a hydrolysis reaction, in a system where two general bases are available to assist the attack of the same nucleophilic water molecule. The suggested mechanism, available uniquely to a phosphatetriester model, is readily available in enzyme active sites, and the results suggest a possible solution to the long‐unsolved
Cu(II)-catalyzed hydrolysis of tris-2-pyridyl phosphate assisted by sodium dodecyl sulfate micelles
作者:Eduardo H. Wanderlind、Catiunaiara R. Bittencourt、Alex M. Manfredi、Adriana P. Gerola、Bruno S. Souza、Haidi D. Fiedler、Faruk Nome
DOI:10.1002/poc.3837
日期:2019.1
Hydrolysis of the phosphate triester tris‐2‐pyridyl phosphate is catalyzed upon complexation with Cu2+, with enhancements of the order of 107‐fold in comparison to the spontaneous hydrolysis of the substrate. Experimental and theoretical results suggest that Cu2+ most probably coordinates to the nitrogen atoms of two of the pyridyl substituents disposing a metallo‐bound water or hydroxo ligand at appropriate
A step-economical and operationally simple nickel-catalyzed cross-electrophile coupling of aryl phosphates with arylbromides through C−O bond cleavage, which precluded the employment of relatively moisture-labile and unreadily available organometallics, was developed. The reaction proceeded smoothly in the presence of magnesium turnings and lithium chloride in THF to afford the corresponding biaryls
[EN] ENGINEERING BACTERIA AND USE THEREOF IN PRODUCTION OF DANSHENSU<br/>[FR] MODIFICATION GÉNÉTIQUE DE BACTÉRIES ET LEUR UTILISATION DANS LA PRODUCTION DE DANSHENSU<br/>[ZH] 一种工程菌及其在丹参素生产中的应用