With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1065181-58-9,Ethyl 5-bromo-1H-indole-7-carboxylate,as a common compound, the synthetic route is as follows.
Intermediate 25:Ethyl 5-bromo-3-(tetrahydro-3-thienyl)-1H-indole-7-carboxylate.Dihydro-3(2H)-thiophenone (0.381 g, 3.73mmol) was dissolved in dichloromethane (50ml) in an oven dried flask containing 3A molecular sieves and stirred under Argon at O0C. TMS-OTf (0.826g, 3.73mmol, 0.67 ml.) was added slowly to the mixture over 10 min. Ethyl 5-bromo-1 /-/-indole-7-carboxylate (1 g, 3.73mmol) was dissolved in DCM (6 ml.) and added to the reaction via syringe pump over 2 hours, after which it was stirred for 30 min at 0 0C. Triethylsilane (0.651 g, 0.89ml, 5.59mmol) was then added all at once and the reaction was stirred at room temperature for 18 hours. The reaction was then quenched with a saturated sodium bicarbonate solution (35 ml.) and extracted with DCM (2 x 50 ml_). The combined organics were washed with water (2 x 100 ml_), brine, dried with MgSO4, and concentrated. The crude compound was purified on Combiflash silica column with 10% EA/Hexane to give 0.62Og (47%) of the title compound. LCMS m/z =355 (M+H), RT = 1.34 min., 1065181-58-9
The synthetic route of 1065181-58-9 has been constantly updated, and we look forward to future research findings.
Reference：
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/118724; (2008); A1;,
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