I[C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:12][CH2:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1.[Br:13][CH2:14][CH2:15][CH2:16][CH2:17][O:18][CH2:19][C:20]#[CH:21].C1COCC1>[Cu]I.CCOCC>[Br:13][CH2:14][CH2:15][CH2:16][CH2:17][O:18][CH2:19][C:20]#[C:21][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:12][CH2:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1
A mixture of 1-(4-iodophenyl)pyrrolidine (22.8 g), the product of stage (i) (16.0 g), BTPC (1.5 g) and copper (I) iodide (150 mg) in DEA (125 ml) and THF (125 ml) was stirred under nitrogen for 18 h. The dark mixture was treated with ether (250 ml), the precipitate was removed by filtration and the filtrate was concentrated to a black oil which was purified by FCC (hexane→System D 9:1) to give the title compound as a pale yellow oil (3.0 g) T.l.c. (System D 9:1) Rf 0.24.
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