Diethyl Ether → 4-Bromo-5-methylisoquinolin-1(2H)-one

Participants

Reaction Steps

To a stirred solution of 5-methylisoquinolin-1(2H)-one (Intermediate-3) (10 g, 63 mmol) in CH2Cl2 (100 mL) was added, Br2 (11.1 g, 69.3 mmol) drop wise and the mixture was stirred at RT (room temperature) overnight. Et2O (200 mL) was added to it, stirred for few min after which, a yellow solid precipitated out. It was filtered, washed with MeOH (10 mL), and dried to give desired intermediate (10 g, 67%) as white solid.

Provenance & Evidence