Hydrogen peroxide promoted hydroxylation of haloarenes and heteroarenes
作者:William R. Cantrell、William E. Bauta、Tracy Engles
DOI:10.1016/j.tetlet.2006.04.020
日期:2006.6
Addition of aqueous hydrogen peroxide significantly accelerates the substitution reactions of hydroxide salts with haloarenes bearing electron withdrawing substituents. A similar effect is observed in the reactions of hydroxide salts with halogenated heteroarenes. Reactions are carried out in water or water-THF at ambient temperature or at 50-60 degrees C. (c) 2006 Elsevier Ltd. All rights reserved.
Isolation, Synthesis, and Characterization of Impurities and Degradants from the Clofarabine Process
作者:Bruce G. Anderson、William E. Bauta、William R. Cantrell, Jr.、Tracy Engles、Dennis P. Lovett
DOI:10.1021/op800182x
日期:2008.11.21
process impurities and their subsequent isolation, synthesis, and characterization is described. Two isomeric process impurities resulting from N6-attachment of a fluoroarabinose to clofarabine were found. Clofarabine’s base degradation products, which were different from the process impurities, were also synthesized and characterized. These compounds resulted from modifications to the sugar moiety, the