A versatile new approach for the synthesis in three steps of 2-substituted-2,3-dihydro[1,4]dioxino[2,3-b]pyridines B via a Smiles rearrangement using easily available reagents is described. A study illustrating the influence of experimental conditions on the progress of the reaction is reported.
描述了一种通用的新方法,该方法通过使用易于获得的试剂的Smiles重排以三步合成2-取代的2,3-二氢[1,4]二恶英[2,3- b ]吡啶B。据报道,研究表明了实验条件对反应进程的影响。
Synthesis of 2-Substituted-2,3- dihydro-1,4-dioxino[2,3-<i>b</i>]pyridine Derivatives
[GRAPHICS]A variety of 2-substituted-2,3-dihydro-1,4 dioxino[2,3-b]pyridines B have been synthesized from the readily available 2-nitro-3-oxiranylmethoxypyridine 1 via a Smiles rearrangement. We demonstrate how variations of reaction conditions affect the product distribution of A and B.