Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 19064-18-7, name is (2,6-Difluorophenyl)methanol. This compound has unique chemical properties. The synthetic route is as follows. Safety of (2,6-Difluorophenyl)methanol
(b) 13.0 g of 2,6-difluorobenzyl alcohol and 8.4 g of methanesulphonyl chloride are dissolved in 90 ml of methylene chloride, and 17.6 ml of triethylamine in 18 ml of methylene chloride are added dropwise while stirring in an ice bath. The rate at which the triethylamine is added is so regulated that the internal temperature does not exceed 10. The whole is stirred for a further 40 minutes in the ice bath and then 90 ml of ice-water are added and the whole is stirred for a further 60 minutes. The organic phase is separated off and dried over magnesium sulphate, and 21 g of the monosodium salt of imidazole-4,5-dicarboxylic acid diethyl ester (obtainable, for example, by reacting imidazole-4,5-dicarboxylic acid diethyl ester with 2.53 g of sodium dissolved in 60 ml of ethanol) are added. The whole is stirred for 3 hours at room temperature, washed three times with water, dried over magnesium sulphate, concentrated to dryness by evaporation, dissolved in toluene/ethyl acetate (1:1), filtered over silica gel, again concentrated to dryness by evaporation and recrystallized from ether/petroleum ether. 1-(2,6-difluorobenzyl)-imidazole-4,5-dicarboxylic acid diethyl ester having a melting point of 68-70 is obtained.
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Reference:
Patent; Ciba-Geigy Corporation; US4851424; (1989); A;,
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