中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-甲基-6-苯基-4(1h)-吡啶酮 | 2-Methyl-6-phenyl-1,4-dihydropyridin-4-on | 7500-03-0 | C12H11NO | 185.225 |
Flash vacuum pyrolysis of ethyl 3-(3-methyl-5-oxo-2,5-dihydroisoxazole-2-yl)-3-phenylpropenoate yields 4-ethoxy-3-hydroxy-2-methyl-5-phenylpyridine in addition to the expected pyrrole. The structure assignment is based on two-dimensional NMR and computational evidence. The pyrolysis of the corresponding dimethyl amide gives a mixture of three 3-hydroxypyridines, in addition to the pyrrole. Evidence is presented for the formation of intermediate 1,4-oxazepines by a six-electron electrocyclic reaction of a carbene with ester or amide carbonyl groups.