Effect of Cyclodextrins on Electrophilic Aromatic Bromination in Aqueous Solution
作者:Paul G. Dumanski、Christopher J. Easton、Stephen F. Lincoln、Jamie S. Simpson
DOI:10.1071/ch03102
日期:——
molecular reactors to change the ratios of the products of reactions of anisole, acetanilide, 3-methylanisole, and 3-methylacetanilide with pyridinium dichlorobromate. With anisole and acetanilide, bromination at the para position is favoured over ortho substitution, and the effect is greatest with α-cyclodextrin. In the reactions of the methylanisole and methylacetanilide, the cyclodextrins afford higher
[EN] SUBSTITUTED ARYL-FLUOROBORATES AS IMAGING AGENTS<br/>[FR] ARYL-FLUOROBORATES SUBSTITUÉS EN TANT QU'AGENTS D'IMAGERIE
申请人:UNIV BRITISH COLUMBIA
公开号:WO2009012596A1
公开(公告)日:2009-01-29
Substituted aryl-boron compounds comprising at least one 18F atom, as illustrated by the formula (I), where at least one of Y1 or Y2 is 18F and A1 is a substituted aromatic ring, with G1-5 being, independently, C or N, and where the substitutents of the aromatic ring or polycyclic moiety (other than boron) comprise at least one electron-withdrawing group (EWG), providing that sigma total (σ total) for all substituents on the aromatic ring or polycyclic moiety except B is about 0.06 or more when said at least one EWG is positioned ortho to B, or about 0.2 or more when no EWG is positioned ortho to B. The compounds include neutral (N=1) and ionic borate (N=2) embodiments. The compounds are useful as positron emission tomography (PET) imaging agents.
We report a novel and environmentally friendly method for the ipso-bromination of arylboronicacids by exploiting the oxone/KBr system. We discovered that CuBr can catalyze the reaction and increase the yield from 63 to 97%. We believe that CuBr might catalyze the in situ generation of HOBr from oxone/KBr. The mild reaction condition permits tolerance of a diverse array of functional groups with exclusive
We describe the dehydroxymethylbromination of alkoxybenzyl alcohol by using a hypervalent iodine reagent and lithium bromide in F3CCH2OH at room temperature. Selective monobromination or dibromination was possible by adjusting the molar ratios of hypervalent iodine reagent and lithium bromide.
Heterobivalent Inhibitors of Acetyl-CoA Carboxylase: Drug Target Residence Time and Time-Dependent Antibacterial Activity
作者:Matthew T. Cifone、YongLe He、Rajeswari Basu、Nan Wang、Shabnam Davoodi、Lauren A. Spagnuolo、Yuanyuan Si、Taraneh Daryaee、Craig E. Stivala、Stephen G. Walker、Peter J. Tonge