Synthesis of 1,4-2H-oxazine derivatives was performed by Pd(II)-catalyzed aerobic oxidative cyclization of 3-aza-5-alkenols, prepared from easily available 1,2-amino alcohols. The reaction proceeds in very mild conditions with a simple catalytic system consisting of PdCl2(MeCN)2 in THF at room temperature with molecular oxygen as the sole stoichiometric oxidant.
1,4-2H-
吡嗪衍
生物的合成是通过Pd(II)催化的有氧氧化环化反应实现的,该反应使用了由易得的1,2-
氨基醇制备的3-氮-5-烯醇。在极温和的条件下,该反应在室温下以THF中的PdCl2(MeCN)2作为简单的催化系统,分子氧作为唯一的计量氧化剂进行。