[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[P:6](=O)([C:12]1[O:13][CH:14]=[CH:15][CH:16]=1)[C:7]1[O:8][CH:9]=[CH:10][CH:11]=1.II.C(P(CCCC)CCCC)CCC>C(#N)C.C1COCC1>[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[P:6]([C:7]1[O:8][CH:9]=[CH:10][CH:11]=1)[C:12]1[O:13][CH:14]=[CH:15][CH:16]=1100 mg (0.431 mmol) of tri(2-furyl)phosphine oxide (31P NMR, s, −15.4) were treated with I2 11 mg (43 μmol) and tributylphosphine 180 μL (0.70 mmol) in acetonitrile/THF (1:1 v/v) 2 mL for 19 hours at room temperature, which gave 31P NMR integrated conversion of tri(2-furyl)phosphine (31P NMR, s, −76.5) in ca. 50%.
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