552330-86-6, name is 5-Bromoisoindolin-1-one, belongs to indolines-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Recommanded Product: 552330-86-6
Step 1: tert-Butyl 5-bromo-1-oxoisoindoline-2-carboxylate (0650) (0651) (Boc)2O (69.5 g, 318.33 mmol) was added slowly to 5-bromoisoindolin-1-one (45 g, 212.22 mmol) and DMAP (38.9 g, 318.33 mmol) in acetonitrile (1000 mL) at room temperature over a period of 30 minutes under nitrogen. The resulting solution was stirred at this temperature for 12 hours. The solvent was removed under reduced pressure. The residue was treated with water (500 mL), extracted with DCM (3¡Á500 mL), the organic layer was dried over Na2SO4, filtered and evaporated to afford brown oil. The crude product was purified by flash silica chromatography, elution gradient 0 to 10% EtOAc in petroleum ether. Pure fractions were evaporated to dryness to afford tert-butyl 5-bromo-1-oxoisoindoline-2-carboxylate (55.0 g, 83%). (0652) LC/MS: m/z=256,258 [M-tBu+H]+. 1H NMR (400 MHz, CDCl3) delta 1.62 (s, 9H), 4.76 (s, 2H), 7.63-7.66 (m, 2H), 7.78 (d, J=8.0 Hz, 1H).
The synthetic route of 552330-86-6 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; AstraZeneca AB; NARJES, Frank; OLSSON, Roine Ingemar; VON BERG, Stefan; LEVER, Sarah; (112 pag.)US2017/166527; (2017); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem