反应详情

A mixture of 3-hydroxy-3-(4-methoxyphenyl)propanoic acid (13.7 mg, 0.07 mmol), (Z)-tert-butyl (4-acetamido-3,5-dichlorobenzylamino)(amino)-methylenecarbamate (26.3 mg), PyBop (36.4 mg), and triethylamine (0.01 mL) in dichloromethane (0.35 mL) was stirred at room temperature for 12 h. The crude reaction mixture was purified directly by preparative TLC eluting with 30% ethyl acetate/70% hexanes to give the title compound as a clear sticky oil (30 mg, 77% yield). 1H NMR (400 MHz, CDCl3) δ 1.48 (m, 9 H) 2.21 (s, 3 H) 2.70 (m, 2 H) 3.78 (m, 3 H) 4.55 (m, 2 H) 4.95 (m, 1 H) 6.80-7.00 (m, 3 H) 7.24-7.38 (m, 4 H), 9.10 (m, 1 H), 12.30 (m, 1 H). HPLC retention time: 2.493 min (method A). MS (ESI) (M+H)+ 553.08.

1. customThe crude reaction mixture
2. customwas purified directly by preparative TLC
3. washeluting with 30% ethyl acetate/70% hexanes