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 100510-65-4 as follows. Safety of 6-Amino-3,3-dimethylindolin-2-one
570 mg (2.20 mmol) of ethyl 3-ethoxy-2-[(ethoxycarbonyl)carbamoyl]acrylate and 388 mg (2.20 mmol) of 6-amino-3,3-dimethyl-1,3-dihydro-2H-indol-2-one [for preparation see: US 2006/258689, page 35] were initially charged in 14 ml of ethanol and heated to reflux for 2 h. Subsequently, at RT, 247 mg (2.20 mmol) of potassium tert-butoxide were added and the mixture was stirred at RT for 1 h and at 60 C. for 1 h. For workup, the reaction mixture was admixed with water, acidified with 1N hydrochloric acid and extracted twice with ethyl acetate. The combined organic phases were dried over magnesium sulphate, filtered and concentrated. The residue was subjected to extractive stirring in MTBE/ ethyl acetate, and the solid formed was filtered off, washed with ethyl acetate and then dried at 50 C. under reduced pressure. This gave 630 mg (79% of theory) of the title compound. LC-MS (Method 1): Rt=0.65 min; MS (ESIpos): m/z=344 (M+H)+. 1H NMR (400 MHz, DMSO-d6): delta [ppm]=1.22 (t, 3H), 1.28 (s, 6H), 4.16 (q, 2H), 6.96-7.01 (m, 1H), 7.04-7.09 (m, 1H), 7.42 (d, 1H), 8.27 (s, 1H), 10.58 (s, 1H), 11.65 (s, 1H).
According to the analysis of related databases, 100510-65-4, the application of this compound in the production field has become more and more popular.
Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; Fuerstner, Chantal; Ackerstaff, Jens; Straub, Alexander; Meier, Heinrich; Tinel, Hanna; Zimmermann, Katja; Tersteegen, Adrian; Zubov, Dmitry; Kast, Raimund; Schamberger, Jens; Schaefer, Martina; Boerngen, Kirsten; US2015/148340; (2015); A1;,
Indoline – Wikipedia,
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