Diisopropylethylamine → 4-Amino-6-[1-(6-fluoro-3,4-dihydro-5-oxa-1,2a-diazaacenaphthylen-2-yl)ethylamino]pyrimidine-5-carbonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-(6-fluoro-3,4-dihydro-5-oxa-1,2a-diazaacenaphthylen-2-yl)ethylamine (108 mg, 0.49 mmol), 4-amino-6-chloro-5-cyanopyrimidine (75 mg, 0.49 mmol) and DIPEA (171 μL, 0.98 mmol) in IPA (1 mL) was heated for 18 h at 100° C. After cooling to RT, the volatiles were removed in vacuo and the resulting residue was taken up in MeOH and acidified with TFA, at which point the solution became homogenous. The reaction mixture was passed through a 2 g Isolute® SCX-2 cartridge, eluting with 2M NH3/MeOH. The basic fraction was concentrated in vacuo and the resulting brown residue was purified by column chromatography (Si—PPC, gradient 0-8% 2M NH3/MeOH in DCM) to afford 434 as a pale yellow solid (125 mg, 75%). LCMS (Method K): RT 2.49 min [M+H]+ 340.1. 1H NMR (DMSO, 400 MHz): δ 8.02 (1H, s), 7.74 (1H, d, J=7.4 Hz), 7.27 (2H, br s), 7.09 (1H, dd, J=8.7, 3.3 Hz), 6.95 (1H, dd, J=12.3, 8.8 Hz), 5.60 (1H, dq, J=7.4, 6.8 Hz), 4.50-4.41 (2H, m), 4.36-4.27 (2H, m), 1.58 (3H, d, J=6.8 Hz)

Provenance & Evidence