[CH3:1][C:2]([CH:4](O)[CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[CH2:3].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCCCC>O1CCCC1.C(Cl)(Cl)(Cl)Cl>[CH3:3][C:2]([C:4]#[C:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[CH2:1]A solution of 100 mmol of 2-methyl-4-phenylbut-1-en-3-ol (16.02 g) in 90 mL of tetrahydrofuran and 210 mL of carbon tetrachloride was mixed with 300 mmol (78.70 g) of dry triphenylphosphine. The solution was heated to boiling under reflux for 2 hours, whereupon a precipitate formed. After cooling, 400 mL of pentane was added and the precipitate was separated by filtration. The solvent was removed from the filtrate under reduced pressure and the residue was fractionally distilled to give 2-methyl-4-phenylbut-1-en-3-yne havng the formula: ##STR27##
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