Abstract Organic synthesis intermediates 2-aminobenzothiazole synthesis method, comprises the following steps: 3 mol aniline and 12 L isopropyl alcohol solution were 5 added to the reaction vessel, the stirring speed was controlled at 110-130 rpm, 1.6 L hydrochloric acid solution and 4-5 mol 2-methylthiocyanobenzene were added, and the temperature of the solution was raised to 60-70 'C, control the stirring speed at 130-150 rpm, keep for 90-120 min, reduce the solution temperature to 40-45 0C, reflux for 60-80 min, stand for cooling, crystal precipitated, the crystal dissolved in 10 cyclohexane solution, vacuum distillation, collecting 80-90 "C fraction, adding 8L oxalic acid solution, lowering the solution temperature to 10-16 C, precipitated crystals, filter it, washed with triethylamine solution, washed with ethylene glycol dimethyl ether solution, dehydrated with dehydrating agent.
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