Adding a certain compound to certain chemical reactions, such as: 33543-78-1, name is Ethyl 1H-imidazole-2-carboxylate, belongs to imidazoles-derivatives 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 33543-78-1, Safety of Ethyl 1H-imidazole-2-carboxylate
Ethyl 1H-imidazole-2-carboxylate at 0 C(40.01 g, 285.5 mmol) in a dry THF (600 mL) suspension Sodium hydride (13.82 g, 345.5 mmol, mass fraction 60%) was added.The reaction mixture was stirred at room temperature for 1 hour and then cooled to 0 C.O-(2,4-dinitrophenyl)hydroxylamine (80.00 g, 401.8 mmol) was added portionwise.The reaction system was stirred at room temperature overnight and then diluted in water (600 mL).The resulting mixture was extracted with EA (600 mL×10).The separated organic phase was dried over anhydrous sodium sulfate, filtered and evaporated.The residue obtained is purified by silica gel column chromatography (EA/PE (v/v) = 1/2 to 1/1 to 2/1).The title compound is a brown solid(37.6 g, yield 85%).
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Reference:
Patent; Guangdong Dongyangguang Pharmaceutical Co., Ltd.; Jiatuo Sciences Corporation; Xi Ning; Li Xiaobo; Li Minxiong; Zhang Tao; Hu Haiyang; Wu Yanjun; (102 pag.)CN108570048; (2018); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem