反应详情

A mixture of 308 (370 mg, 1.05 mmol) and (2-methoxy-phenyl)-acetyl isocyanate (240 mg, 1.25 mmol) [A. J. Hill, et al. JACS, 62; 1940; 1595] was stirred for 1 h at room temperature, loaded directly onto a flash chromatography column and eluted with EtOAc, to afford the title compound 309c in 42% yield as a white solid. 1H NMR (d-DMSO) δ (ppm): 10.98(s, 1H), 10.69(s, 1H), 8.41(d, 1H, J=5.3 Hz), 7.94(d, 1H, J=1.2 Hz), 7.81(dd, 1H, J1=13.1 Hz, J2=2.4 Hz), 7.77(d, 1H, J=0.9 Hz), 7.65(s, 1H), 7.45-7.40(m, 2H), 7.26-7.19(m, 2H), 6.97(d, 1H, J=8.0 Hz), 6.89(dt, 1H, J1=0.8 Hz, J2=8.2 Hz), 6.54(d, 1H, J=5.5 Hz), 4.04(q, 2H), 3.75(s, 3H), 3.70(s, 2H), 1.38(t, 3H). MS (m/z): 546.1(M+H) (found).

1. washeluted with EtOAc