<i>exo</i>-2-(Pyridazin-4-yl)-7-azabicyclo[2.2.1]heptanes: Syntheses and Nicotinic Acetylcholine Receptor Agonist Activity of Potent Pyridazine Analogues of (±)-Epibatidine
作者:Daqing Che、Thomas Wegge、Milton T. Stubbs、Gunther Seitz、Heinrich Meier、Christoph Methfessel
DOI:10.1021/jm000949w
日期:2001.1.1
A new strategy for the straightforwardsynthesis of novel racemic epibatidineanalogues is presented, in which the 2-chloropyridinyl moiety of epibatidine is bioisosterically replaced by differently substituted pyridazine rings. A key step of the new syntheses is the inverse type Diels-Alder reaction of the electron-rich enol ether 13 with the electron-deficient diazadiene systems of the 1,2,4, 5-tetrazines