Adding a certain compound to certain chemical reactions, such as: 3843-97-8, name is 5-Chloro-2-ethylaniline, belongs to chlorides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 3843-97-8, Quality Control of 5-Chloro-2-ethylaniline
A mixture of 5-chloro-2-ethylaniline (3.35 g, 21.5 mmol), p-toluensulfonic acid (12.29 g, 64.6 mmol) and water (2.15 mL) were ground in a mortar for few minutes, to obtain a homogeneous paste to which solid sodium nitrite (3.71 g, 53.8 mmol) was added and the paste ground for 10 min. Solid potassium iodide (8.94 g, 53.8 mmol) was added and the paste ground for 20 min. The paste was then dissolved in water (50 mL) and treated with sodium sulfite (10% aq. sol.), before being extracted with EtOAc (3 x 100 mL). The combined organic layers were dried over sodium sulfate and the crude was purified by flash chromatography (hexane) to obtain the title compound as a light-yellow oil (4.35 g, 76%).1H NMR (400 MHz, DMSO-d6) delta ppm 1.12 (t, J=7.51 Hz, 3 H), 2.66 (q, J=7.53 Hz, 2 H), 7.29 – 7.35 (m, 1 H), 7.42 (dd, J=8.30, 2.20 Hz, 1 H), 7.87 (d, J=2.20 Hz, 1 H).
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Reference:
Patent; NERVIANO MEDICAL SCIENCES S.R.L.; BRASCA, Maria, Gabriella; BERTRAND, Jay, Aaron; GNOCCHI, Paola; MOTTO, Ilaria; NESI, Marcella; PANZERI, Achille; VIANELLO, Paola; WO2013/14039; (2013); A1;,
Chloride – Wikipedia,
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