反应详情

The procedure described under (A) is followed with 3-hydroxy-1,2-dimethylpyrid-4-one in place of 1-ethyl-3-hydroxypyrid-2-one to give the neutral 2:1 complex from ethanol as a white crystalline solid in essentially quantitative yield, m.p. 190° C. (with decomposition); νmax 1655, 1612 cm-1 ; δ(d6DMSO); 7.53 (d, 1H), 6.20 (d, 1H), 3.70 (s, 3H), 2.33 (s, 3H).