Trifluoroacetic acid → (R)-1-{4-[6-(3-Aminopiperidin-1-yl)pyridin-3-ylamino]-6-(3-chloro-5-fluoro-4-hydroxyphenyl)-1,5-naphthyridin-3-yl}ethanone

Participants

Reaction Steps

Following general procedure IV-2, (R)-tert-butyl 1-(5-(3-acetyl-6-(3-chloro-5-fluoro-4-hydroxyphenyl)-1,5-naphthyridin-4-ylamino)pyridin-2-yl)piperidin-3-ylcarbamate (100 mg, 0.16 mmol) was reacted with TFA (2.0 mL) to afford the desired product (56 mg, 67%) as a yellow-brown solid: 1H NMR (500 MHz, CD3OD) δ 9.27 (s, 1H), 8.40 (d, J=9.0 Hz, 1H), 8.33 (d, J=9.0 Hz, 1H), 8.16 (d, J=2.7 Hz, 1H), 7.59 (dd, J=9.1, 2.8 Hz, 1H), 7.44 (s, 1H), 7.20 (d, J=11.7 Hz, 1H), 6.97 (d, J=9.1 Hz, 1H), 4.39 (dd, J=12.6, 3.4 Hz, 1H), 3.38-3.94 (m, 2H), 3.43-3.21 (m, 5H), 2.79 (s, 3H), 2.17 (m, 2H), 1.93 (m, 1H), 1.80-1.66 (m, 2H); ESI MS m/z 507 [M+H]+; HPLC 98.8% (AUC), tR=9.34 min.

Provenance & Evidence