Phthalic Anhydride → 2-(3,3,3-Trifluoro-2-hydroxy-2-methylpropyl)-1H-isoindole-1,3(2H)-dione

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Reaction Steps

A mixture comprising 3,3,3-trifluoro-2-hydroxy-2-methyl-propyl-ammonium (0.9 g), phthalic anhydride (1.039 g) and DIPEA (2.188 ml) in chloroform (30 ml) was heated at 70° C. for 5 hours. After cooling to RT, the mixture was washed with water and passed through a phase separator. The organic phase was reduced to dryness. The crude product was purified by chromatography on silica, eluting in a 0% to 30% iso-hexane:EtOAc removed to give the title product; 1H NMR (400 MHz, Methanol-d4) δ 7.92 (2H, m), 7.85 (2H, m), 3.95 (2H, m), 1.36 (3H, s).

Provenance & Evidence