3-Butyn-1-OL → HCID 86584412, compound

Participants

Reaction Steps

2,4-Dicloropyrimidine (4.47 g, 0.03 M) was dissolved in triethylamine (250 ml) under argon. (Ph3P)2PdCl2 (420 mg, 0.006 M, CuI (28 mg, 0.00015 M) and 3-butyn-1-ol (2.36 ml, 0.03 M) were added and the mixture was stirred at ambient temperature for 18 hrs. After evaporation to dryness, water (250 ml), was added and extracted with dichloromethane. The combined organic phases were dried and evaporated to dryness. The residual oil was chromatographed, eluting with iso-hexane/ethyl acetate 1:1 to yield 4-(2 chloro-4-pyrimidyl)-3-butyn-1-ol as an oil (3.3 g) NMR (CDCl3) d 8.5, (d 1H); 7.3, (d 1H); 3.9, (t 2H); 2.8, (m 2H); 1.6, (s 1H). Mass Spec found MH+ 183. This material was hydrogenated as described above, but in the presence of 1 equivalent of triethylamine, to give the required saturated alcohol which was oxidised using the previously described Swern oxidation to give the required 4-(4-pyrimidyl)-butan-1-al. NMR CDCl3 d 9.8, (s 1H); 9.1; (s 1H); 8.5, (d 1H); 7.1, (d 1H); 2.8, (t 2H); 2.5, (t 2H); 2.1, (m 2H). Mass spec found MH− 149.

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