Diisopropylethylamine → Olaparib

Participants

Reaction Conditions

Reaction Steps

2-Fluoro-5-[(4-oxo-3,4-dihydrophthalazin-1-yl)methyl]benzoic acid (D)(15.23 g, 51.07 mmol) was suspended with stirring under nitrogen in acetonitrile (96 ml). Diisopropylethylamine (19.6 ml, 112.3 mmol) was added followed by 1-cyclopropylcarbonylpiperazine (1)(9.45 g, 61.28 mmol) and acetonitrile (1 ml). The reaction mixture was cooled to 18° C. O-Benzotriazol-1-yl-tetramethyluronium hexafluorophosphate (25.18 g, 66.39 mmol) was added over 30 minutes and the reaction mixture was stirred for 2 hours at room temperature. The reaction mixture was cooled to 3° C. and maintained at this temperature for 1 hour, before being filtered. The filter cake was washed with cold (3° C.) acetonitrile (20 ml) before being dried in vacuo at up to 40° C. to give the title compound as a pale yellow solid (20.21 g).

Provenance & Evidence