| 摘要 |
The present invention relates to oxaphosphorins of the formula <IMAGE> (I) where Ar-Ar is 1-phenylnaphthyl or 1,1'-binaphthyl, R1 and R2 are identical or different and are F, Cl, alkyl or alkoxy each having from I to 8 carbon atoms or substituted or unsubstituted aryl, a and b are identical or different and are each an integer from 0 to 4, or Ar-Ar is biphenyl, R1 and R2 are identical or different and are substituted or unsubstituted aryl, a and b are as defined above, but a+b>/=1, X is Cl or Br and the Ar-P and Ar-O bonds are each arranged in the ortho position to the Ar-Ar bond. The invention further relates to a process for preparing these oxaphosphorins.
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