In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 118289-55-7, name is 6-Chloro-5-(2-chloroethyl)indolin-2-one belongs to indolines-derivatives compound, it is a common compound, a new synthetic route is introduced below. Formula: C10H9Cl2NO
Preparation of 5-(2-(4-(l ,2-benzisothiazol-3-yl)-1 -piperazinyl)ethvD-6-chloro-l ,3-dihydro-2H-indol-2-one(Ziprasidone)In a 50 ml 3 necked round bottom flask there were placed 1 gram (4.56 mmol) of 3-piperazinylbenzo[d]isothiazole; 1.25 grams (5.43 mmol) of 6-chloro-5-(2-chloroethyl)indolin-2-one; 50 mg of potassium iodide; 0.82 gram (5.94 mmol) ofpotassium carbonate and 3 ml of sulfolane. The contents of the flask were heated to 95C to 100 C. The reaction was monitored by HPLC. After completion of the reaction, 50ml of DM water was added to the reaction mixture and stirred. The product was filtered off and washed with water and dried to obtain 1.41 grams (75%) of 5-(2-(4-(l,2-benzisothiazol-3-yl)-l-piperazinyl)ethyl)-6-chloro-l,3-dihydro-2H-indol-2-one. The crude product was purified by IPA and/ or THF. The product matched the spectra of a standard NMR and showed the correct retention time by HPLC with 98.0% assay. The melting point of the compound was found to be 218C -220 C, and was found to conform with the melting point of 218 -220 C as disclosed in US. 5,206,366. Example 3Preparation of 5-(2-(4-(‘l,2-benzisothiazol-3-vD-l-piperazinvDethvl)-6-chloro-l,3-dihydro-2H-indol-2-one(Ziprasidone)In glass-lined reactor placed 21.1 Kg (96.34 mole) of 3-piperazinylbenzo [d]isothiazole; 31 kg (134.7 moles) of 6-chloro-5-(2-chloroethyl)indolin-2-one; 1.1 kg ofpotassium iodide; 20.0 kg (111.92 mole) of potassium carbonate and 63.2 lit ofsulfolane. The contents of the flask were initially heated to 75C to 80 C for 2 hrs.Then temperature was raised to 95C to 100 C and stirred till completion of thereaction. After completion of the reaction 210 lit of DM water was added to the reaction mixture and stirred. The product was filtered off and washed with water and dried to obtain 29.75 kg of 5-(2-(4-(l,2-benzisothiazol-3-yl)-l-piperazinyl)ethyl)-6-chloro-l,3-dihydro-2H-indol-2-one (Ziprasidone).
The synthetic route of 118289-55-7 has been constantly updated, and we look forward to future research findings.