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A solution of the title A compound, 5-bromo-2, 3-DIHYDRO-1 H-INDOLE (15. 75 g, 79.54 mmol) in 200 mL acetonitrile and 200 mL dichloromethane is treated with DMAP (0.971 g, 7.95 mmol) and di-t-butyl dicarbonate (19.14 g, 87.49 MMOL). The solution is stirred at RT for 16 h. The mixture is diluted with 300 mL dichloromethane and washed twice with 1 N aqueous HCI and once with brine, dried over anhydrous MGS04, and concentrated to afford 5-bromo-2,3- dihydro-indole-1-carboxylic acid tert-butyl ester.
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Reference:
Patent; NOVARTIS AG; NOVARTIS PHARMA GMBH; WO2004/65351; (2004); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem