反应详情

Starting from the compound 273 and following the procedure described above for the synthesis of compound 262a (scheme 59, example 218, step 4), title compound 274 was obtained in 99% yield as a white solid. 1H NMR (DMSO-d6) δ (ppm):12.44(s, 1H), 11.79(s, 1H), 8.82(s, 1H), 8.03(d, 1H), 7.99(dd, 1H), 7.54(d, 1H), 7.41(dd, 1H), 7.32-7.24(m, 6H), 3.80(s, 2H). MS (m/z):517.0 (M+H) (found).