Reference of 52570-33-9, These common heterocyclic compound, 52570-33-9, name is Methyl 3-iodo-2-methylbenzoate, 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.
[0470] To a solution of methyl 3-iodo-2-methylbenzoate (15 g, 54.35 mmol) in N,N-dimethylacetamide (200 mL) at rt was added K4[Fe(CN)6].3H2O (5.74 g, 13.59 mmol) and sodium carbonate (5.76 g, 54.35 mmol), followed by palladium acetate (1.5 g) added. The suspension was evacuated and replaced with nitrogen, then heated to 120C for 10 hrs. The reaction mixture was cooled to rt, filtered, and the filtrate was diluted with water (100 mL), and extracted with EA (200 mL) twice. The combined organic layers were washed with water, brine, dried over sodium sulfate, filtered and concentrated providing the crude product, which was purified by column chromatography on silica-gel elution with petroleum ether:EA (from 50/1 to 30/1) providing methyl 3-cyano-2-methylbenzoate (4.6 g, 48.4% yield) as a white solid. MS (ESI) m/z 175.9 [M+H]+. 1H NMR (400 MHz, CDCl3) delta 8.08 (d, J = 7.6 Hz, 1 H), 7.76 (d, J = 8.0 Hz, 1 H), 7.36 (t, J = 7.6 Hz, 1 H), 3.93 (s, 3 H), 2.80 (s, 3 H).
The synthetic route of 52570-33-9 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; BIOTHERYX, INC.; CHAN, Kyle, W.H.; FUNG, Leah; SULLIVAN, Robert; ERDMAN, Paul, E.; MERCURIO, Frank; (225 pag.)WO2017/201069; (2017); A1;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com