Some common heterocyclic compound, 5398-69-6, name is 2-Iodo-3-nitrobenzoic acid, molecular formula is C7H4INO4, 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. Computed Properties of C7H4INO4
2-Iodo-3-nitro-benzoic Acid Methyl Ester 2-iodo-3-nitro-benzoic acid (61 g, 208 mmol, prepared as described in Org. Syn. Coll. Vol. 1, 56-58, and 125-127), sulfuric acid (40.8 g, 416 mmol), and trimethyl orthoformate (88.4 g, 833 mmol) were dissolved in 500 mL dry MeOH. The reaction was refluxed under argon for 20 h. The reaction mixture was concentrated to 100 mL then partitioned between saturated NaHCO3(aq) and CH2Cl2. The layers were separated and the aqueous layer extrated three times with CH2Cl2. The combined organic layers were dried (MgSO4) and concentrated in vacuo. The yellow solid was crystallized from CH2Cl2/hexanes yielding 2-iodo-3-nitro-benzoic acid methyl ester, 57.8 g (90%) as a yellow solid: m.p.64.0-64.5 C.; 1H NMR (300 MHz, CDCl3) 3.99 (s, 3H), 7.54 (app t, J=7.8 Hz, 1H), 7.70 (dd, J=8.1, 1.8 Hz, 1H), 7.77 (dd, J=7.8, 1.8 Hz, 1H).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5398-69-6, its application will become more common.
Reference:
Patent; Agouron Pharmaceuticals, Inc.; US6495541; (2002); B1;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com