Reference of 144689-93-0,Some common heterocyclic compound, 144689-93-0, name is Ethyl 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate, molecular formula is C12H20N2O3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
EXAMPLE 1: 3-(4-Bromo-benzyl)-5-(1-hydroxy-1-methyl-ethyl)-2-propyl-3H-imidazol-4-carboxylic acid ethyl ester (IV; X=Br) NaH (228 mg, 9.53 mmol), previously placed under N2 atmosphere and washed with pentane to remove paraffin, is reacted at 0C with a solution of a compound of formula (IX), wherein R4 is ethyl (1.76 g, 7.33 mmol), dissolved in DMF (5 mL). 10 minutes after the addition, a solution of a compound of formula (X), wherein X=Z=Br (2.02 g, 8.06 mmol) in DMF (10 mL) is added thereto. The mixture is left under stirring for 1 hour, then diluted with ethyl acetate and water. The organic phase is separated, dried and evaporated to a residue. The crude is subjected to purification by flash chromatography with a 50 mm diameter column, eluding with a hexane/ethyl acetate 1:1 mixture. 2.15 g of the title compound are obtained; yield: 45%. 1H-NMR (CDCl3) 0.96 (3H, t, J=7.4 Hz) 1.18 (3H, t, J=7.1 Hz) 1.65 (6H, s) 1.70 (2H, sx, J=7.5 Hz) 2.62 (2H, t, J=7.7 Hz) 4.23 (2H, q, J=7.1 Hz) 5.41 (2H, s) 5.76 (1H, s) 6.81 (2H, d, J=8.3 Hz) 7.46 (2H, d, J=8.3 Hz).
The synthetic route of 144689-93-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Dipharma Francis S.r.l.; EP1905770; (2008); A1;,
Imidazole – Wikipedia,
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