New oxorhenium complexes with 2-(diphenylphosphanyl)-N-(2-thioethyl)benzamide (HPNS) and trimethyl-, triethyl- and triphenyl-hydroxyl silylated monodentate thiols are reported. These new complexes have been prepared by reacting [(NBu4)-Bu-n][Re(O)Cl-4] with the tridentate HPNS and the corresponding silylated thiol at room temperature. The characterization of the complexes involved elemental analysis, P-31 and H-1 NMR spectroscopies and X-ray crystallographic analysis for the triethyl-silylated Re complex. (C) 2002 Elsevier Science B.V. All rights reserved.
The Effects of Sulfur Substitution for the Nucleophile and Bridging Oxygen Atoms in Reactions of Hydroxyalkyl Phosphate Esters
作者:Subashree Iyer、Alvan C. Hengge
DOI:10.1021/jo8002198
日期:2008.7.1
The effects of sulfur substitution on the reactions of hydroxyalkyl phosphate esters are examined. These compounds are models for the intramolecular phosphoryl transfer reaction involved in the cleavage of the internucleotide bond in RNA. The models studied here lack the ribose ring and their conformational flexibility results in greater stability and the availability of different reaction pathways