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 53:Ethyl 5-bromo-3-(tetrahydro-2H-thiopyran-3-yl)-1H-indole-7-carboxylate.Dihydro-2H-thiopyran-3(4/-/)-one (0.217g, 1.86mmol) was dissolved in dichloromethane (23ml_) in an oven dried flask containing 3 A molecular sieves and stirred under argon at 00C. TMS-OTf (0.414g, 1.86mmol, 0.33 ml.) was added slowly to the mixture over 10 min.Ethyl 5-bromo-1 /-/-indole-7-carboxylate (0.5g, 1.86mmol) was dissolved in DCM (7ml_) and added to the reaction via syringe pump over 2 hours, after which it was stirred for 3 hours between 0 and 10 0C. The reaction was cooled to 0 0C and triethylsilane (0.325g, 0.44ml_, 2.8mmol) was 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 and extracted with DCM. The combined organics were washed with water. The combined aqueous layers were back-extracted with DCM. The combined organics were washed with brine, dried with MgSO4, and concentrated. The crude compound was purified on a Combiflash silica column with 5-25% EA/Hexane to give 0.279g (40%) of the title compound.LC/MS: m/z 369 (M+H), Rt 2.74 min., 1065181-58-9
1065181-58-9 Ethyl 5-bromo-1H-indole-7-carboxylate 59332585, aindole-building-block compound, is more and more widely used in various fields.
Reference：
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/118724; (2008); A1;,
Indole alkaloid derivatives as building blocks of natural products from?Bacillus thuringiensis?and?Bacillus velezensis?and their antibacterial and antifungal activity study
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles