Pentachloro-12H-dibenzo[1, 3, 2]dioxaphosphocin 6-sulfide(5) was prepared in high yield from bis(2-hydroxy- 3, 5-dichlorophenyl) methane (4) and PSCl3. When 5 was reacted with phenols in the presence of anhydrous K2CO3 and Cu powder. Tetrachloro-6-aryloxy-12H- dibenzo[1, 3, 2] dioxaphosphocin 6-sulfides(6) were obtained, Treatment of 5 with RONa-ROH solution led to compounds 7, 6-alkoxyl analogues of 6. In the presence of Et3N, 5 reacted with propanol offered tetrachloro-6-hydroxy-12H-dibenzo[1, 3, 2] dioxaphosphocin 6- sulfide triethylamine salt(8). When 8 was refluxed in DMSO, the corresponding phosphocin-6-oxide 9 was obtained.

Key words: CHLOROHYDROCARBON, DIBENZO COMPOUNDS, THIOPHOSPHATE P, PHOSPHOROUS HETEROCYCLIC COMPOUNDS, OXYGEN HETEROCYCLICS, EIGHT MEMBER RING HETEROCYCLIC COMPOUNDS, SYNTHESIS