Water → 6-Fluoro-7-hydroxy-3,4-dihydroisoquinolin-1(2H)-one

Participants

Reaction Steps

To a solution of 5-fluoro-6-hydroxyindan-1-one ((90), 10.5 g, 63.3 mmol) in chloroform (600 ml) was added NaN3 (12.3 g, 190 mmol), followed by dropwise addition of methanasulfonic acid (33 ml, 506 mmol). Resulting mixture was stirred for 3 hr. The reaction mixture was poured into cold water and extracted with chloroform (3×). Organic extracts were combined and washed with H2O and sat. NaCl, then dried over Na2SO4. Concentration in vacuo gave a mixture of required product and reversed lactam. Purification of crude product on silica eluting with 30-60% EtOAc/Hexane offered the title compound as a off-white solid (5.3 g, 46%). MS (ES) m/z 180.0.

Provenance & Evidence