[Br:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.[C:18]1([P:24]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>C1(C)C=CC=CC=1>[Br-:1].[C:31]1([P+:24]([C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=2)([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1Compound 11 (7.0 g) was dissolved in toluene (80 mL) and triphenylphosphine (6.8 g) was added thereto, followed by stirring at 100° C. for 12 hours. Triphenylphosphine (1.3 g) was further added, followed by stirring at 100° C. for 24 hours. After cooling the reaction solution to room temperature, the resulting precipitate was washed with toluene three times and the residue was dried under reduced pressure to obtain the title compound (7.2 g) having the following physical property values.
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