Hantzsch-type 1,4-dihydropyridine derivatives substituted with highly electron-deficient aryl groups in the 4-position, on treatment with a variety of basic reagents in non-hydroxylic solvents, undergo an unexpected and ready scission of the inter-ring bond to give the corresponding 4-unsubstituted pyridine and an arene derived from the original 4-substituent. The scope of the reaction has been investigated
在非羟基溶剂中用多种碱性试剂处理后,在4位上被高度缺电子的芳基取代的Hantzsch型1,4-二氢
吡啶衍生物经历了意想不到的即刻断裂的环间键得到相应的4-未取代的
吡啶和衍生自原始4-取代基的
芳烃。已经研究了反应的范围并讨论了可能的机理。