2-Nitropropane → 3-Methyl-3-nitro-1,1,1-trifluorobutan-2-ol

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A mixture of triflouroacetaldehyde ethyl hemiacetal (2.58 ml), 2-nitropropane (1.81 ml) and potassium carbonate (111 mg) is stirred at 65° C. (oil bath temperature) for 6 hours followed by 2.5 days at room temperature. The reaction mixture is diluted with water (100 ml) and extracted with methylene chloride (100 ml+5×50 ml). The combined organic layers are dried over sodium sulphate and the solvent is evaporated under reduced pressure. Purification of the liquid residue by flash chromatography on silica gel (eluant n-hexane/ethylacetate 85:15) affords 3-methyl-3-nitro-1,1,1-trifluorobutan-2-ol as an oil (2.005 g)

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