Br[C:2]1[N:7]=[CH:6][CH:5]=[CH:4][N:3]=1.[CH2:8]([OH:14])[CH2:9][CH2:10][CH2:11][C:12]#[CH:13].C1(NC2CCCCC2)CCCCC1.C(#N)C>[Cu]I.CCOCC>[N:3]1[CH:4]=[CH:5][CH:6]=[N:7][C:2]=1[C:13]#[C:12][CH2:11][CH2:10][CH2:9][CH2:8][OH:14]A mixture of 2-bromopyrimidine (3.96 g), 5-hexynol (2.44 g), dicyclohexylamine (4 g), BTPC (250 mg), copper (I) iodide (25 mg) and acetonitrile (40 ml) was stirred at ambient temperature under nitrogen for 1 h (temp. rose to ~45°). Ether (120 ml) was added, the mixture was filtered and the filtrate was evaporated in vacuo to an oil which was purified by FCC. Elution with ether followed by System C (17:3) gave the title compound as a pale yellow oil (3.64 g), t.l.c. (System C 17:3) Rf 0.34.
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