These common heterocyclic compound, 5332-26-3, name is 2-(Bromomethyl)isoindoline-1,3-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. name: 2-(Bromomethyl)isoindoline-1,3-dione
3.5 g (87 mmol) of sodium hydride are added in portions to a solution of 25 g (87 mmol) of dimethyl2- (4- ert-butoxycarbonylpiperazin-l-yl) malonate in 250 ml of tetrahydrofuran cooled to 2C. The reaction medium is stirred at ambient temperature for 30 minutes, then brought to 2C before dropwise addition of 21 g (87 mmol) of 2- (bromomethyl) isoindole-1, 3-dione in 200 ml of tetrahydrofuran . The reaction medium is stirred at ambient temperature for 20 h, treated by addition of 500 ml of water then extracted with ethyl acetate. The organic phase is dried over magnesium sulphate, filtered and concentrated under vacuum.The crude product obtained is purified by chromatography over silica gel eluted with a 70/30 heptane/ethyl acetate mixture. 27.5 g (73%) of dimethyl 2- (4- ert-butoxycarbonylpiperazin-l-yl) -2- (1, 3-dioxo- 1, 3-dihydro-isoindol-2-ylmethyl) malonate are obtained in the form of a white solid.
The synthetic route of 2-(Bromomethyl)isoindoline-1,3-dione has been constantly updated, and we look forward to future research findings.
Reference:
Patent; GALDERMA RESEARCH & DEVELOPMENT; CHAMBON, Sandrine; CLARY, Laurence; SCHUPPLI, Marlene; WO2011/33009; (2011); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem