As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 3032-81-3 name is 1,3-Dichloro-5-iodobenzene, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below. 3032-81-3
Step A Synthesis of 5-hydroxy-5-(3,5-dichlorophenyl)hexanenitrile as an intermediate The Grignard reagent of 3,5-dichlorophenyl iodide was prepared by the reaction of 20.0 grams (0.073 mole) of 3,5-dichlorophenyl iodide and 1.8 grams (0.073 mole) of magnesium turnings in 350 mL of diethyl ether. The reaction mixture was heated at reflux for about three hours and then allowed to cool to ambient temperature. To the Grignard reagent, with stirring, was added dropwise during a 15 minute period a solution of 8.4 mL (0.073 mole) of 5-oxohexanenitrile in 25 mL of diethyl ether. The exothermic reaction caused the reaction mixture temperature to rise to about 30¡ã C. Upon completion of addition, the reaction mixture was stirred for one hour and then was poured into 400 mL of water. The mixture was made acidic with about 80 mL of aqueous 2N hydrochloric acid and extracted with two 200 mL portions of diethyl ether. The combined extracts were dried with magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residue. The residue was subjected to column chroma-tography on silica gel, using 5percent diethyl ether in methylene chloride as the eluant. The product-containing fractions were combined and concentrated under reduced pressure, yielding 8.4 grams of 5-hydroxy-5-(3,5-dichlorophenyl)hexanenitrile. The NMR spectrum was consistent with the proposed structure.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3032-81-3, and friends who are interested can also refer to it.
Reference:
Patent; FMC Corporation; US5521192; (1996); A;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com