(1) Prepare 2 moles of 20% NaI aqueous solution A and 2.1 moles of 8-10% sodium hypochlorite aqueous solution B for spare use;
(2) Add 900g of anisole in a 2L four-necked round-bottomed flask equipped with stirring, a temperature display, and two constant-pressure dropping funnels and heat it up to 60-70C with stirring; then, dropwise add the sodium iodide solution and sodium hypochlorite solution simultaneously at the ratio of molar ratio 1:1.05 with stirring;
(3) After dropping and adding, warm it up to 75-80C and get the light yellow reaction solution; cool it down to 75-80C; and cool it down to 80%. Sodium iodide solution and sodium hypochlorite solution;
(3) after dropping, warm up to 75~80 , stirring for 1 hour, to get light yellow reaction solution; cooled to room temperature, static phase splitting; the organic phase washed with water, drying and filtration, to get the anisole solution of 2-iodoanisole, distillation, cooling, curing, to get the white lumpy crystals, i.e., 2-iodoanisole, whose content is 98.5%, yield 93.4% .