3-(氯甲基)庚烷

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 1 l jacketed glass reactor with a glass paddle stirrer, an immersed tube for reactant metering and an attached water separator is initially charged with 200 g of N-n-butylalkylpyridinium chloride (prepared according to Example 1 as catalyst and adjusted to a temperature of 135° C. 519.8 g of 2-ethylhexanol are introduced uniformly via the immersed tube within 5 h. Over the entire reaction time, gaseous hydrogen chloride is likewise metered in via the immersed tube in a slight stoichiometric excess (223 g). The water of reaction is distilled off azeotropically with the target product and removed as the lower phase in the water separator, while the upper phase is recycled into the reactor. After a total reaction time of 22 h, the conversion based on the 2-ethylhexanol is 99.3%. prepared adjusted to a temperature of 135° C is distilled off azeotropically with the target product removed as the lower phase in the water separator, while the upper phase After a total reaction time of 22 h

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 51.7 g (0.34 mol) of 4-hydroxybenzoic acid methylester, 500 ml of dimethyl formamide, 60 g (0.40 mol) of 2-ethylhexylchloride and 21.8 g (0.40 mol) of sodium methylate was heated for 7 hours to boiling temperature and, after cooling and removal of the sodium chloride by filtration, was evaporated to dryness under reduced pressure. The residue was dissolved in methylene chloride and chromatographed (eluent: methylene chloride) on silica gel (Merck) to yield 43 g (48% of the theoretical) of 4-(2-ethylhexyloxy)benzoic acid methylester. A refractive index of was heated for 7 hours after cooling removal of the sodium chloride by filtration was evaporated to dryness under reduced pressure The residue was dissolved in methylene chloride chromatographed (eluent: methylene chloride) on silica gel (Merck)