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 104:Ethyl 5-bromo-3-(tetrahydro-3-thienylmethyl)-1 H-indole-7-carboxylate.To a solution of tetrahydro-3-thiophenecarbaldehyde (5.0 g, 43.10 mmol) in dichloromethane (200 mL) was added TMS-OTf (15.4 mL, 86.26 mmol) and ethyl 5- bromo-1 H-indole-7-carboxylate (11.5 g, 43.10 mmol) dropwise at 0 0C. The mixture was stirred at 0 0C for 2h, and then triethylsilane was added at the same temperature, which was maintained for 2h. The reaction was warmed to 20 0C and stirred for 16h. Water was added, the layers were separated, and the organic layer was (Na2SO4),concentrated, and purified on silica gel (PE:EA = 50:1 ), giving 9g (56.4) of the title compound. 1H NMR (CDCI3): delta 1.43 (t, 3H), 2.08 (m, 1 H), 2.58 (m, 2H), 2.88 (m, 6H), 4.44 (q, 2H), 7.09 (s, 1 H), 7.89 (s, 1 H), 7.95 (s, 1 H), 9.65 (s, 1 H).
1065181-58-9, As the paragraph descriping shows that 1065181-58-9 is playing an increasingly important role.
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