Methanesulfonyl chloride → 6-tert-butyl-8-fluoro-2-(2-(hydroxymethyl)-3-(1-methyl-5-(5-(1-(methylsulfonyl)-piperidin-4-yl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridazin-3-yl)phenyl)phthalazin-1(2H)-one

Participants

Reaction Conditions

Reaction Steps

In a 10 mL round-bottomed flask, 6-tert-butyl-8-fluoro-2-(2-(hydroxymethyl)-3-(1-methyl-6-oxo-5-(5-(piperidin-4-yl)pyridin-2-ylamino)-1,6-dihydropyridazin-3-yl)phenyl)phthalazin-1(2H)-one (35.03 mg, 57.5 μmol, Eq: 1.00) was combined with DCM (3 ml) and cooled to 0° C. DIPEA (8.91 mg, 12.0 μl, 68.9 μmol, Eq: 1.2) was added, followed by addition of methanesulfonyl chloride (6.58 mg, 4.48 μl, 57.5 μmol, Eq: 1). The reaction mixture was stirred at 0° C. to room temperature for 1 hr. The crude material was purified by flash chromatography (silica gel, 4 g, 0% to 5% of MeOH in 50% EtOAc/Hexane) to afford white solid (16 mg, 45%). (M+H)+=688.4 m/e. 1H NMR (300 MHz, CHLOROFORM-d) δ: 8.56 (s, 1H), 8.48 (br. s., 1H), 8.29 (br. s., 1H), 8.20 (br. s., 1H), 7.42-7.70 (m, 6H), 7.04 (d, J=8.2 Hz, 1H), 4.42 (br. s., 2H), 4.11 (q, J=7.0 Hz, 2H), 3.95 (d, J=11.3 Hz, 2H), 2.82 (s, 3H), 2.74-2.81 (m, 2H), 2.62 (t, J=11.5 Hz, 1H), 2.04 (s, 3H), 1.77-1.99 (m, 4H), 1.42 (s, 9H).

Provenance & Evidence