The Microwave Assisted Nucleophilic Substitution of 4-Hydroxy-6-methyl-2(1<i>H</i>)-pyridones
作者:Dieter Heber、Edmont V. Stoyanov
DOI:10.1055/s-1999-2929
日期:1999.11
The condensation of 4-hydroxy-6-methyl-2(1H)-pyridones 1 with araliphatic amino compounds 2 gives rise to the 4-alkylamino-6-methyl-2(1H)-pyridones 3. Irradiation using an ordinary domestic microwave oven provides a fast and simple method for their preparation. However, under the conditions used, aliphatic and aromatic amines gave no reaction
A comparative study of conventional conditions versus microwave irradiation for the preparation of novel 1,2-dihydro-2-imino-7-methyl-1,6(6<i>H</i>)-naphthyridin-5-ones
作者:Dieter Heber、Edmont V. Stoyanov
DOI:10.1002/jhet.5570370432
日期:2000.7
The synthesis of novel 1,6-naphthyridines 6 with potential activity against tuberculosis is described using the reaction sequence 2←4←6. Depending on the ring N-substitution of the 4-alkylamino-6-methyl-2(1H)-pyridones 1 and 2 the electrophilic attack of the Vilsmeier reagent gives rise to the formation of the exocyclic N-formyl derivatives 3 from 1 and the corresponding 3-carbaldehydes 4 from 2. 1