Electric Literature of 5394-18-3, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 5394-18-3 name is 2-(4-Bromobutyl)isoindoline-1,3-dione, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.
A^-(4-Bromobutyl)phthalimide 7 (9.70 g, 34.40 mmol) was added to a suspension ofpotassium carbonate (8.20 g, 59.30 mmol) andpiperazine-1-carboxylic acid tert-butyl ester 8(5.00 g, 26.80 mmol) in acetone (125 mL). The mixture was heated at reflux for 14 hours. After cooling to ambient temperature, the reaction mixture was filtered and the filtrate concentrated to a waxy yellow solid. Purification by column chromatography (silica gel, gradient of 70:30 to 0:100 hexanes/ethyl acetate, v/v) gave compound 9 (8.69 g, 84 %) as a yellow solid: *H NMR (300 MHz, CDC13) 8 1.45 (s, 9H), 1.46-1.59 (m, 2H), 1.63-1.76 (m, 2H), 2.32-2.40 (m, 6H), 3.38-3.44 (m, 4H), 3.71 (t, J = 6.9 Hz, 2H), 7.71-7.73 (m, 2H), 7.82-7.84 (m, 2H); ESI MS m/z 388 [C21H29N3O4 + H]+.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-(4-Bromobutyl)isoindoline-1,3-dione, and friends who are interested can also refer to it.
Reference:
Patent; JOHNSON, Michael, R.; WO2006/23617; (2006); A2;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem