activation energies of various hydridetransferreactions was developed according to transition state theory using the Morse-type free energy curves of hydride donors to release a hydride anion and hydrideacceptors to capture a hydride anion and by which the activation energies of 187 typical hydride self-exchange reactions and more than thirty thousand hydride cross transferreactions in acetonitrile were
A New Synthetic Route to Unsymmetrical 9-Arylxanthenes
作者:Sajal Kumar Das、Ritesh Singh、Gautam Panda
DOI:10.1002/ejoc.200900676
日期:2009.10
A facile and general three-step synthetic route towards unsymmetrical 9-arylxanthenes was developed. The reaction sequence involves nucleophilic substitution of commercially available 2-fluorobenzaldehydes with arenoxides, Grignard reaction of the resulting 2-arenoxybenzaldehydes with arylmagnesium bromides, followed by FeCl3-catalyzed intramolecular diarylmethylation of the resulting carbinols. This
graphene oxide (GO)‐based materials for C−Ccross‐coupling represents a significant advance in carbocatalysis. Although GO has been used widely in various catalytic reactions, the scope of reactions reported is quite narrow, and the relationships between the type of functional groups present and the specific activity of the GO are not well understood. Herein, we explore CH−CH‐type cross‐coupling of xanthenes
Methods and compositions for determining the purity of chemically synthesized nucleic acids
申请人:NORTH CAROLINA STATE UNIVERSITY
公开号:EP1944321A2
公开(公告)日:2008-07-16
This application describes a.n antibody that specifically binds to a synthetic oligomer (e.g. an oligonucleotide or oligopeptidc) having a organic protecting group covalently bound thereto, which antibody does not bind to that synthetic oligomer when the organic protecting group is not covalently bound thereto. Methods of making and using such antibodies are also disclosed, along with cells for making such antibodies and articles carrying immobilized oligomers that can be used in assay procedures with such antibodies.