Ethyl 2-(4-Ethylpiperazin-1-yl)-2-(4-(4-methyl-6-(2-methyl-3-(5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophene-2-carboxamido)phenyl)-3-oxo-3,4-dihydropyrazin-2-ylamino)phenyl)acetate → 2-(4-Ethylpiperazin-1-yl)-2-(4-(4-methyl-6-(2-methyl-3-(5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophene-2-carboxamido)phenyl)-3-oxo-3,4-dihydropyrazin-2-ylamino)phenyl)acetic Acid

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Reaction Steps

Using the same procedure as described for the preparation of 29, saponification of 45 (1.29 g) gave a 97% yield (1.20 g) of 46 as an off-white solid: mp 168-170° C.; 1H NMR (300 MHz, DMSO-d6) δ 9.79 (s, 1H), 9.25 (s, 1H), 7.96 (d, 2H, J=7.5 Hz), 7.70 (s, 1H), 7.29 (m, 6H), 3.86 (m, 1H), 3.71 (s, 3H), 3.37 (q, 2H, J=7.2 Hz), 2.81 (m, 2H), 2.69 (m, 2H), 2.42 (br s, 8H), 2.19 (s, 3H), 1.83 (br s, 2H), 1.61 (br s, 4H), 0.95 (t, 3H, J=7.2 Hz); MS (ESI+) m/z 655 (M+H).

Provenance & Evidence