反应详情

Compound 12b was prepared from 11b similar to 12a as pale-yellow solid, mp 240° C. (dec.). 1H NMR (DMSO-d6), 7.042 (d, 1, J=1.8), 7.312 (d, 1, J=1.8), 7.421 (s, 2), 10.918 (s, 1). 1H NMR (DMSO-d6 +D2O), 7.054 (s, 1), 7.302 (s, 1).