反应详情

To a stirred solution of 27.8 g. of 4-cyclopropyl-4-hydroxy-1-octyne (Example 9) and 33.3 g. of imidazole in 130 ml of dimethylformamide at 5° C. is added 24 ml. of chlorotrimethylsilane during 5 minutes. The solution is stirred at ambient temperature for 17 hours and then partitioned with 600 ml of hexane and 250 ml of ice-water. The hexane phase is separated and washed successively with water and brine. The solution is dried over magnesium sulfate and evaporated to give a liquid, p.m.r. spectrum (C D Cl3): δ0.12 (singlet, trimethylsiloxy group), 2.02 (triplet, HC≡C), and 2.45 (doublet, C≡CH2).

1. custompartitioned with 600 ml of hexane and 250 ml of ice-water
2. customThe hexane phase is separated
3. washwashed successively with water and brine
4. dry with materialThe solution is dried over magnesium sulfate
5. customevaporated
6. customto give a liquid, p.m.r