These common heterocyclic compound, 603-62-3, name is 3-Nitrophthalimide, 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. Formula: C8H4N2O4
To a solution of potassium hydroxide (16.1 g, 286 mmol) in water (500 mL), was added 3-nitrophthalimide (25.0 g, 130 mmol) in portion at 0 C. The suspension was stirred at 0 C for 3 hrs, and then heated to 30 C for 3 hrs. To the solution, was added HCl (100 mL, 6N). The resulting suspension was cooled to 0 C for 1 hr. The suspension was filtered and washed with cold water (2 x 10 mL) to give 3-nitro-phthalamic acid as a white solid (24.6 g, 90% yield): 1H NMR (DMSO-d6) S 7.69 (brs, 1H, NHH), 7.74 (t, J= 8 Hz, 1H, Ar), 7.92 (dd, J= 1, 8 Hz, 1H, Ar), 8.13 (dd, J= 1, 8 Hz, 1H, Ar), 8.15 (brs, 1H, NHH), 13.59 (s, 1H, OH);13C NMR (DMSO-d6) S 125.33, 129.15, 130.25, 132.54, 136.72, 147.03, 165.90, 167.31.
The synthetic route of 3-Nitrophthalimide has been constantly updated, and we look forward to future research findings.
Reference:
Patent; CELGENE CORPORATION; TROTTER, Matthew William, Burnell; RISUENO-PEREZ, Alberto; POURDEHNAD, Michael; GANDHI, Anita; HAGNER, Patrick; (85 pag.)WO2017/53555; (2017); A1;,
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