反应详情

温度

40 °C

To (R)-methyl 3-(4-(5-(3-cyano-4-isopropoxyphenyl)-1,2,4-oxadiazol-3-yl)-2,3-dihydro-1H-inden-1-ylamino)propanoate (71.0 mg, 0.16 mmol) in EtOH (5 ml) was added aqueous NaOH (1.9 mL, 1M). The solution was stirred at 40° C. for 4 h. The reaction mixture was poured onto ice (10 mL) and neutralized to pH 7 with 1M HCl. The solution was partitioned between DCM and H2O. The organic layer was collected, dried under vacuum, and purified by preparative HPLC to give 29.7 mg (31%) of (R)-3-((4-(5-(3-cyano-4-isopropoxyphenyl)-1,2,4-oxadiazol-3-yl)-2,3-dihydro-1H-inden-1-yl)amino)propanoic acid 62. LCMS-ESI (m/z): calcd for: C24H24N4O4, 432.5; [M+H]+ found 433.20, tR=2.51 min. 1H NMR (400 MHz, MeOD) δ 8.46 (d, J=2.1, 1H), 8.45-8.40 (m, 1H), 8.29-8.23 (m, 1H), 7.82-7.73 (m, 1H), 7.60-7.52 (m, 1H), 7.45 (d, J=9.0, 1H), 5.06-4.92 (m, 2H), 3.69-3.52 (m, 1H), 3.51-3.37 (m, 1H), 3.26 (s, 2H), 2.75-2.58 (m, 1H), 2.56-2.46 (m, 2H), 2.44-2.29 (m, 1H), 1.46 (d, J=6.0, 6H).

1. additionThe reaction mixture was poured onto ice (10 mL)
2. customThe solution was partitioned between DCM and H2O
3. customThe organic layer was collected
4. customdried under vacuum
5. custompurified by preparative HPLC