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 132898-96-5 as follows. COA of Formula: C8H4ClNO4S
General procedure: To a stirred solution of the N-Boc-protected pyrrolidine (1.0 mmol) in dry DCM (3 mL) at 0 C under argon atmosphere, TFA (1.14 g, 10.0 mmol) was added dropwise. The obtained solution was stirred at 0 C for 30 min followed by stirring at r.t. for 2 h. Subsequently, the solution was poured to cold 10% aq. NaOH (15 mL) and extracted with DCM (3 ¡Á 15 mL). The combined organic phases were dried over MgSO4 and concentrated under reduced pressure resulting in the corresponding unprotected pyrrolidine, which was used in the next step without further purification. The free pyrrolidine (ca. 1 mmol) from the previous step was then taken up in CHCl3 (2.2 mL) and DIPEA (2.0 mmol) was added. The solution was added dropwise to a stirred solution of 5-chlorosulfonyl isatin (1.5 mmol) in CHCl3/THF (1:1, 15 mL) at room temperature. The resulting mixture was stirred further for 1 h and the solvent was removed under reduced pressure. After purification by flash column chromatography the target isatin sulfonamide was obtained.
According to the analysis of related databases, 132898-96-5, the application of this compound in the production field has become more and more popular.
Reference:
Article; Limpachayaporn, Panupun; Riemann, Burkhard; Kopka, Klaus; Schober, Otmar; Schaefers, Michael; Haufe, Guenter; European Journal of Medicinal Chemistry; vol. 64; (2013); p. 562 – 578;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem