Through a novel cyclization reaction, four new 2 - alkoxyl - 2H - 1,3,2 -benzoxazaphosphorine 2 - oxides or 2 - sulfides were synthesized . A possible cyclization mechanism was proposed.

• 通过一个尚未见文献报道的新型环化反应,合成了四个新型1,3,2-氧氮磷杂萘类化合物,并提出了该反应的机理。