432-21-3, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 432-21-3 as follows.
1-Chloro-3-iodo-2-trifluoromethyl-benzeneTo a suspension of 3-Chloro-2-trifluoromethyl-phenylamine hydrochloride (30.9 g, iQ 0.16 mol) in H2O (90 mL) was added cone. HCI (65 mL) portion wise allowing the reaction to heat up to -45 0C. The temperature was maintained for 30 min then cooled in an ice bath < 5 0C. CH2CI2 (10 mL) was added and -10 min later a solution of sodium nitrite (13.6 g, 0.197 mol) in H2O (25 mL) was added dropwise. After a further 30 min, a solution of NaI (28.2 g, 0.188 mol) in H2O (50 mL) was again added dropwise keeping the temperature < 5 0C j 5 throughout both additions. After -1 h the reaction was diluted with CH2CI2 (200 mL) and sodium metabisulfite was added until the I2 color had been discharged. The layers were separated and the organic washed with brine, dried and the solvent evaporated to give 1- Chloro-3-iodo-2-trifluoromethyl-benzene (38.3 g, 79%) as an orange solid, which was used without further purification. MS: APCI: M+: 306.0 (305.9)
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 432-21-3, and friends who are interested can also refer to it.
Reference:
Patent; PFIZER PRODUCTS INC.; WO2008/20306; (2008); A2;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics