反应详情

A stirred solution of ethyl (S)-3-(4-aminophenyl)-2-(N-t-butyloxycarbonylamino)propanoate (3.08 g, 10.0 mmol), 1-chloroisoquinoline (1.80 g, 11.0 mmol) and N,N-diisopropylethylamine (1.42 g, 1.91 ml, 11.0 mmol) in 2-ethoxyethanol (1.0 ml) was heated at 130° for 4 h. The volatiles were removed in vacuo and the residue partitioned between EtOAc (120 ml) and saturated aqueous NaHCO3 (50 ml). The phases were separated and the aqueous layer was re-extracted with EtOAc (80 ml). The combined organic extracts were washed with brine (30 ml), dried (MgSO4) and evaporated in vacuo. The obtained dark oil was chromatographed (silica; 20-30% EtOAc/hexane) to afford the title compound as a pink oil which crystallised on standing (2.78 g, 64%). δH (CDCl3) 8.07 (1H, d, J 5.8 Hz), 7.93 (1H, d, J 8.4 Hz), 7.72 (1H, d, J 7.5 Hz), 7.63 (1H, d), 7.61 (2H, d, J 8.5 Hz), 7.51 (1H, t, J 6.8 Hz), 7.23 (1H, br s), 7.10 (1H, br s), 7.10 (2H, d, J 6.8 Hz), 5.02 (1H, br d, J 8.0 Hz), 4.54 (1H, br m), 4.16 (2H, t, J 7.1 Hz), 3.05 (2H, br m), 1.43 (9H, s), 1.25 (3H, t, J 7.1 Hz); m/z (ES+, 60V) 436 (MH+).

1. customThe volatiles were removed in vacuo
2. customthe residue partitioned between EtOAc (120 ml) and saturated aqueous NaHCO3 (50 ml)
3. customThe phases were separated
4. extractionthe aqueous layer was re-extracted with EtOAc (80 ml)
5. washThe combined organic extracts were washed with brine (30 ml)
6. dry with materialdried (MgSO4)
7. customevaporated in vacuo
8. customThe obtained dark oil was chromatographed (silica; 20-30% EtOAc/hexane)