6-Amino-1,2-benzopyrone → N2,N4-bis(coumarin-6-yl)-5-fluoro-2,4-pyrimidinediamine

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Reaction Steps

In like manner to the preparation of N2,N4-bis(3-hydroxyphenyl)-5-fluoro-2,4-pyrimidinediamine, 2,4-dichloro-5-fluoropyrimidine and 6-aminocoumarin were reacted to yield N2,N4-bis(coumarin-6-yl)-5-fluoro-2,4-pyrimidinediamine. 1H NMR (DMSO-d6): δ 8.17 (d, 2H, J=3.6 Hz), 7.97-7.74 (m, 5H), 7.40 (1H, d, J=8.7 Hz), 7.30 (d, 1H, J=9 Hz), 6.50 (d, 1H, J=10.2 Hz), 6.40 (d, 1H, J=9.3 Hz); LCMS: ret. time: 19.05 min.; purity: 94%; MS (m/e): 417 (MH+).

Provenance & Evidence