A series of two-coordinate phosphorus compounds 2-(aryloxyphenylthiophosphonyl)-1,2,3,s2-diazaphospholes I (R = Ph, 3-MeC6H4, 4-MeC6H4, 3,4-Me2C6H3) were prepared by dehydrohalogenation of the 2-(aryloxyphenylthiophosphonyl)-3-chlor-1,2,3-diazaphospholine II (R = same as above; R1 = Me, Ph, Me3C). II were prepared by the reaction of Ph(RO)P(S)NHN:CRMe with PCl3.

Key words: NITROGEN HETEROCYCLICS, CYCLOPENTADIENE, BENZENE P, ORGANIC SYNTHESIS, KETONE, HYDRAZONE, CYCLIZATION, AROMATIC COMPOUNDS, PHOSPHOROUS HETEROCYCLIC COMPOUNDS, ARYLOXY GROUP