5-IODOINDOLE is an organic compound, which is an isomer containing iodine atom on the Indian core, and has a wide range of uses, such as the pharmaceutical industry, biochemical research and other fields. The following are some common synthesis methods of 5-IODOINDOLE:
1. Sandmeyer reaction:
The Sandmeyer reaction is one of the most common 5-iodoindole synthesis methods. This reaction usually starts with 5-nitroindole, which is produced by chemical reduction to 5-aminoindole, and then 5-iodoindole is obtained by treating 5-aminoindole with excess iodine and hypochlorite. This method requires the use of solid experimental skills to ensure the purity and yield of the synthesized 5-iodoindole.
5-IODOINDOLE is a commonly used organic photoelectric material, and one of its preparation methods is through the Sandmeyer reaction method. The method uses 5-IODOINDOLE as a raw material and undergoes a series of chemical reactions to finally obtain the target product.
(1.) Prepare reactants. Prepare reactants such as 5-IODOINDOLE, copper chloride, sodium chloride, nitrophenol and sulfuric acid.
(2.) Mix 5-IODOINDOLE with the solution. Add 5-IODOINDOLE to the solution with sodium chloride and nitrophenol and stir well to mix.
(3.) Add copper chloride. Add copper chloride to the reaction solution gradually, and stir well to promote the reaction.
(4.) Add sulfuric acid. Add sulfuric acid to the reaction solution gradually, and stir well to speed up the reaction.
(5.) Add sodium nitrite dropwise. Sodium nitrite was slowly added dropwise into the reaction solution while stirring continuously until the reaction was complete.
(6.) Transfer the reaction solution. The reaction solution was transferred to the precipitation solution, and the product was precipitated.
(7.) Filter. The product was filtered, washed and dried to finally obtain the target product 5-nitro INDOLE.
The above is the Sandmeyer reaction method of 5-IODOINDOLE and its detailed steps.
2. For cyclization reaction:
Using this method, 5-iodoindol-2-yl-acetate can be converted to the corresponding 5-iodoindole by heating the reaction in carbon trichloride. This reaction requires a long reaction process and requires special chemicals, which are the limitations of this method.
(1.) First add ferric chloride and LiBr into dried acetonitrile and stir it. Then 5-bromoindine and catalyst Pd(OAc)2 were added and the mixture was heated to 80 degree .
(2.) By continuously adding N-methylbenzenesulfonamide and keeping the reaction mixture in the temperature range of 80 degree - 90 degree .
(3.) Then the reaction mixture was cooled to room temperature and filtered to obtain the target product-5-IODOINDOLE.
(4.) The product can be purified by purification techniques such as high performance liquid chromatography (HPLC) or column chromatography.
3. Stille reaction:
The Stille reaction is a method based on the nucleophilic aromatic substitution reaction, in which the use of 5-bromoindole and tin is a common method for the preparation of 5-iodoindole. This reaction is slower, requires a longer reaction time, and requires additional measures to ensure that the reaction proceeds smoothly.
(1.) Synthesis of phenyltin compounds: under the protection of nitrogen, react stearic acid with Sn (SnCl4) to generate Sn (stearic acid) 4. Sn(stearate)4 is then reacted with phenylmagnesium halide to produce phenylphenyltinoxytin (Ph2Sn(O)Ph).
(2.) Synthesis of 5-IODOINDOLE: In acetonitrile solvent, react Indole with ethyl iodide to generate 5-IODOINDOLE.
(3.) Reaction conditions: Under the protection of nitrogen, react phenylphenyltin oxide, palladium catalyst and 5-IODOINDOLE, and anneal to generate the target product.
(4.) Structural analysis: use techniques such as nuclear magnetic resonance (NMR) and high-performance liquid chromatography (HPLC) to conduct structural analysis and purity testing of the reaction products.
(5.) Results and discussion: The target product was prepared by the Stille reaction of 5-IODOINDOLE, and the reaction conditions and product structure were analyzed and discussed, which laid the foundation for the synthesis of useful derivatives.
In summary, the Stille reaction of 5-IODOINDOLE is an efficient chemical synthesis method that can be used to prepare a variety of important organic compounds.
4. Combined Sandmeyer reaction and Hiyama reaction:
Sandmeyer reyaksyon Hiyama reyaksyon reyact reyact {0}}chloroindole ak yon organotin reyaji jwenn {{1{1%. 7diodoindoindole catalysis aliminyòm trichloride. Sa a apwòch konesans debaz chimi asire a lis reyaksyon pandan y ap sede trè pwodwi.
5-IODOINDOLE Sandmeyer Reaction and Hiyama Reaction Combined Method
The Sandmeyer reaction is an important aromatic chemical reaction, which is usually used to synthesize aryl nitrogen compounds through amino compounds, and the HIyama reaction is a reaction for the synthesis of carbon-silicon bonds through silicon-based reagents. The combination of these two reactions can introduce substituents and silicon-based functional groups in aryl compounds. Concrete reaction steps:
(1.) Preparation of Diazonium salt: Add 5-IODOINDOLE to the mixed solution of copper oxide and sodium chloride, add concentrated nitric acid dropwise, stir at high speed for 10 minutes, then slowly add boric acid, Stir for 5 minutes. Finally, the solution was adjusted to pH 5.5 with 5 percent NaOH. At this point the precipitate is Diazonium salt.
(2.) Substituent replacement: add copper nitrate solution, and then add potassium chloride or ferrous chloride to convert Diazonium salt into amino compound.
(3.) Hiyama reaction under alkaline conditions: adding TMS stannous chloride, ethanol, boric acid, copper catalyst and TBAF to generate larger molecular silicon-substituted compounds. The reaction product was obtained by extraction in a mixture of chloroform and water.
C8H62 plus HCl → 5-iodo-1H-indazole plus N22O
C8H622O → 5-Iodo-1H-azoles
C8H6233 → 5-Aminoindazole
C7H7N32 plus KCl → 5-chloroindazoles
5-chloroindazoles plus EtOH plus B2O3 plus CuCl → 5-alkoxyindazoles
5-alkoxyindazoles plus TMS-Cl plus Et3N → 5-alkoxyindazoles-SiMe3
In summary, 5-iodoindole can be synthesized by various methods. Which method to choose needs to be determined according to laboratory conditions, chemical knowledge level and reaction requirements.