[Synthesis of 1-and 3-phenyl substituted 1,5-dihydro-2,4-benzoxazepin-3(4H)-ones].

The synthesis of 1-phenyl-1,5-dihydro-2,4-benzoxazepin-3(4H)-ones (II), of 5-phenyl-1,5-dihydro-2,4-benzoxazepin-3(4H)-ones (III) and of the 7-chloro substituted analogs is described. These compounds were prepared by reacting the corresponding amino alcohols with COCl2 in the presence of Na2CO3. The reactivity of some compounds of this series in acid or basic media is also described.