Diisopropylethylamine → HCID 71533438, compound

Participants

Reaction Conditions

Reaction Steps

To a 0° C. cold mixture of 3-[1-(2,4-Difluoro-benzyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl]-benzonitrile (7c) (0.4 g, 1.142 mmol) and 2-tert-butoxyacetic acid (196 mg, 1.485 mmol) was added N,N-diisopropylethylamine (0.59 g, 4.57 mmol) and TOTU (O-(Cyano(ethoxycarbonyl)methylenamino)-1,1,3,3-tetramethyluronium tetrafluoroborate, 562 mg, 1.71 mmol) and the mixture was stirred at 25° C. for 1 h. The crude product was purified by reverse phase HPLC (CH3CN/water gradient with 0.1% trifluoroacetic acid) to give 120 mg of 3-[5-(2-tert-Butoxy-acetyl)-1-(2,4-difluoro-benzyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl]-benzonitrile (8d).

Provenance & Evidence