Electric Literature of 1097871-23-2, These common heterocyclic compound, 1097871-23-2, name is 1-Chloro-2,5-difluoro-4-iodobenzene, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
49-(4-methoxy)-10 borate 1 mmol,1-mmol-4-iododifluorobenzene 1 mmol, tetrakis(triphenylphosphine)palladium 0.1 mmol, toluene 40 mL,10 mL of ethanol and 340 mmol of K2CO (formed as a solution with 10 mL of distilled water) were added to the reaction flask, and then the system was evacuated and protected with nitrogen.The reaction was carried out at 100 C for 12 hours.After the end of the reaction, extraction, rotary distillation, column chromatography (eluent: n-hexane / dichloromethane = 1:1),Recrystallization gave the product A7.The yield was 69%.5A70.5mmol, boranoic acid pinacol ester 1.5mmol,Palladium acetate 0.05 mmol, 2-dicyclohexylphosphine-2′, 6′-dimethoxybiphenyl 0.1 mmol,1.5 mmol of potassium acetate and 25 mL of 1,4-dioxane were added to the reaction flask.The system is then evacuated, protected by nitrogen, and reacted at 90 C for 12 hours.After the reaction is over, extract, spin,Column chromatography (eluent: n-hexane / dichloromethane = 2:1),Recrystallization gave the product B7.The yield was 65%.6 The final product g is obtained by Suzuki coupling reaction:B70.25mmol, the product obtained in step 2, namely 9-bromo-10-(4-cyano)benzoquinone 0.21mmol,Catalyst tetrakis(triphenyl)phosphine palladium 0.03 mmol,Toluene 15mL, ethanol 5mL, K2CO38.4mmol (formed into solution with 5mL distilled water),It was added to the reaction flask and refluxed at 100 C for 12 h under the protection of nitrogen.After the reaction is completed, methanol is washed with hot water, suction filtered, and toluene is recrystallized.Sublimation gives the final product.The yield was 58%.The molecular formula is C48H29F2NO
The synthetic route of 1097871-23-2 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Shaanxi Normal University; Hu Jianyong; Zhang Jiali; Zhao Zhen; (25 pag.)CN109678759; (2019); A;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com