作者:Graham Pattison、Graham Sandford、Dmitry S. Yufit、Judith A.K. Howard、John A. Christopher、David D. Miller
DOI:10.1016/j.tet.2009.08.050
日期:2009.10
Pyridazin-3(2H)-one systems have very useful biological properties and have found many applications within the pharmaceutical and agrochemical industries but, in general, synthesis of polysubstituted analogues can be very difficult to achieve. An approach to the syntheses of polyfunctional pyridazinone systems involving sequential nucleophilic substitution reactions of N-aryl and N-THP protected 4,5,6-trifluoropyridazin-3(2H)-ones as the core scaffolds is described. (c) 2009 Elsevier Ltd. All rights reserved.
Polysubstituted Pyridazinones from Sequential Nucleophilic Substitution Reactions of Tetrafluoropyridazine
作者:Graham Pattison、Graham Sandford、Dmitry S. Yufit、Judith A. K. Howard、John A. Christopher、David D. Miller
DOI:10.1021/jo9006943
日期:2009.8.7
polyfunctional systems can be readily accessed by sequential nucleophilic substitution methodology which may have applications in the drug discovery arena. For example, reaction of 4,5,6-trifluoropyridazin-3(2H)-one with nitrogen nucleophiles leads to a mixture of aminated products arising from substitution of fluorine located at the 4- and 5-positions. The ratio of isomers obtained depends on the nucleophile where