Reference of 689260-53-5, These common heterocyclic compound, 689260-53-5, name is 2-Bromo-5-iodo-1,3-dimethylbenzene, 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.
Step 1: [(3R,4R)-4-(4-Bromo-3,5-dimethyl-phenoxy)-tetrahydrofuran-3-yloxy]-tert-butyl-dimethyl-silane CuI (0.12 g) and 1,10-phenanthroline (0.23 g) are added to a flask charged with a stir bar, 2-bromo-5-iodo-m-xylene (2.00 g), (3R,4R)-4-(tert-butyl-dimethyl-silanyloxy)-tetrahydrofuran-3-ol (1.72 g), Cs2CO3 (4.11 g), and toluene (10 mL) at room temperature. The mixture is stirred at 115 C. overnight. After cooling to room temperature, water is added, and the resulting mixture is extracted with ethyl acetate. The combined extract is washed with aqueous 1 M HCl solution and dried (MgSO4). The solvent is evaporated, and the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 49:1) to give the title compound. Mass spectrum (ESI): m/z=401/403 (Br) [M+H]+.
The synthetic route of 689260-53-5 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Boehringer Ingelheim International GmbH; ECKHARDT, Matthias; WAGNER, Holger; PETERS, Stefan; (46 pag.)US2018/208560; (2018); A1;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com