With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.3279-95-6, name is 2-(Aminooxy)ethanol, molecular formula is C2H7NO2, molecular weight is 77.08, as common compound, the synthetic route is as follows.Formula: C2H7NO2
Step C Preparation of 2-(2-chloro-4-iodo-phenylamino)-3,4-difluoro-N-(2-hydroxy-ethoxy)-benzamide To a solution of the product of Example 6, Step B, 2-(2-chloro-4-iodophenylamino)-3,4-difluorobenzoic acid pentafluorophenyl ester (10.0 g, 17.4 mmol), in anhydrous dimethylformamide (36 mL) was added 2-(aminooxy)-ethanol [prepared by the literature procedure: Dhanak, D.; Reese, C. B. J. Chem. Soc., Perkin Trans. 1 1987, 2829] (1.6 g, 20.8 mmol) and N,N-diisopropylethylamine (6.0 mL, 34.8 mmol). The resultant solution was stirred at ambient temperature for 16 h. The reaction mixture was concentrated to 20% volume then diluted with ethyl acetate (360 mL). The resultant solution was washed with water (6*60 mL) and brine (2*60 mL). The organics were dried over anhydrous magnesium sulfate and concentrated under reduced pressure to afford a white solid that was purified on silica gel. Elution with ethyl acetate-methanol (9:1) afforded 2-(2-chloro-4-iodo-phenylamino)-3,4-difluoro-N-(2-hydroxy-ethoxy)-benzamide (7.31 g, 90%) as a white solid. Recrystallization from methanol afforded analytically pure material: m.p. 173-175 C.; 1H NMR (400 MHz, DMSO-d6) delta 11.93 (br s, 1H), 8.85 (br s, 1H), 7.76 (d, J=1.7 Hz, 1H), 7.48 (dd, J=8.6, 1.7 Hz, 1H), 7.44 (dd, J=8.5, 6.2 Hz, 1H), 7.25 (dt, J=8.5, 9.3 Hz, 1H), 6.58 (dd, J=8.5, 6.4 Hz, 1H), 4.70 (br s, 1H), 3.86 (br s, 2H), 3.56 (br d, J=3.9 Hz, 2H); MS (APCI+)=469.0; MS (APCI-)=467.0; Anal. Calcd/found for C15H12ClF21N2O3: C, 38.45/38.60; H, 2.58/2.53; N, 5.98/5.91; F, 8.11/8.08; I, 27.08/27.43. aa0-5aa
At the same time, in my other blogs, there are other synthetic methods of this type of compound,3279-95-6, 2-(Aminooxy)ethanol, and friends who are interested can also refer to it.
Reference:
Patent; Barrett, Stephen Douglas; Kaufman, Michael David; Rewcastle, Gordon William; Spicer, Julie Ann; US2003/232889; (2003); A1;,
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