These common heterocyclic compound, 611-09-6, name is 5-Nitroindoline-2,3-dione, 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. Application of 611-09-6
General procedure: A mixture of isatin 1a (0.147 g, 1 mmol), malononitrile 2a (0.066 g, 1 mmol), and ethyl aceto-acetate 3a (0.13 mL, 1 mmol) was added to a vial containing a magnetic stirring bar and the ionic liquid ([BMIm]BF4, 5 drops). The reaction mixture was sealed and stirred at room temperature until disappearance of the starting materials (under 1 min). At this stage, the product due to poor solubility in the ionic liquid appears as a precipitate. In order to extract the ionic liquid, after completion of the reaction, the residue was washed with 2×10 mL of either water or diethyl ether. Washing the solid residue with ethanol (10 mL, 95.5%) has given remarkably pure powders of product 4a. The ionic liquid was recovered from the aqueous or ethereal extracts by evaporating under reduced pressure and reused in the next cycles.
Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.Read on for other articles about 611-09-6.
Reference:
Article; Rad-Moghadam, Kurosh; Youseftabar-Miri, Leila; Tetrahedron; vol. 67; 31; (2011); p. 5693 – 5699;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem