Diisopropylethylamine → 1-[4-(Cyanomethyl)-1-(isopropylsulfonyl)piperidin-4-yl]-3-(phenylamino)-1H-pyrazole-4-carboxamide

Participants

Reaction Steps

To a suspension of 4-[4-carbamoyl-3-(phenylamino)-1H-pyrazol-1-yl]-4-(cyanomethyl)piperidinium trifluoroacetate (Intermediate #38-1) (30 mg, 0.068 mmol) in MeCN (0.50 mL) was added DIPEA (0.030 mL, 0.17 mmol) and DMAP (12 mg, 0.10 mmol). To this mixture was added isopropylsulfonyl chloride (0.008 mL, 0.1 mmol). The resulting mixture was allowed to stir at ambient temperature for 1 hour before it was diluted with DMSO (1.0 mL) and purified directly by reverse-phase preparative HPLC (using a gradient elution of 0-100% MeCN/water, with 0.1% v/v HCOOH modifier). Desired fractions were identified, combined and concentrated in vacuo to afford the title compound, Example #37-1. 1H NMR (600 MHz, DMSO-d6): δ 9.03 (s, 1H), 8.47 (s, 1H), 7.54 (br s, 1H), 7.48 (d, J=7.8 Hz, 2H), 7.21 (t, J=7.8 Hz, 2H), 7.15 (br s, 1H), 6.80 (t, J=7.8 Hz, 1H), 3.50-3.56 (m, 2H), 3.19 (s, 2H), 2.98-3.10 (m, 2H), 2.38-2.49 (m, 3H), 2.02-2.08 (m, 2H), 1.15 (d, J=6.6 Hz, 6H). LRMS (ESI) calc'd for C20H26N6O3S [M+H]+: 431. Found: 431.

Provenance & Evidence