C([O:3][P:4]([C:9]#[C:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)([O:6]CC)=[O:5])C.C[Si](Br)(C)C>>[P:4]([C:9]#[C:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)([OH:6])([OH:5])=[O:3]1-Diethylphosphono-2-phenylacetylene was deesterified with TMSBr as described in Step D, Example 1, to provide the title compound (no. 16.01) as a solid. HPLC Rt=3.75 min; negative ion electrospray MS M−1 found: 181.
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