Methyl 2-t-butoxycarbonylamino-4-[4-[4-(4-pyridyl)-piperazin-1-yl]phenoxy]butyrat → Methyl 2-amino-4-[4-[4-(4-pyridyl)piperazin-1-yl]-phenoxy]butyrate

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Reaction Steps

The compound of Example 140 (0.96 g) in TFA (10 ml) was kept at room temperature for 2 hours. The solution was evaporated and the residue dissolved in water (15 ml) and the solution basified with sodium carbonate. The mixture was extracted three times with dichloromethane. Evaporation of the combined extracts gave the title compound (0.56 g); m.p. 125°-127° C.; NMR(d6DMSO) δ 8.2(2H,d), 6.92(6H,m), 4.0(2H,m), 3.64(3H,s), 3.46(4H,t), 3.15(4H,t), 2.04(2H,m), 1.84(1H, m); m/e 371(M+H)+. Calculated for C20H26N4 O3. 0.75 H2O: C, 62.5; H, 7.17; N, 14.6. Found: C, 62.8; H, 6.8; N, 14.3%.

Provenance & Evidence