作者:Chudi Ndubaku、Jinhua Chen、Zijin Xu、Tao Wang、Joseph Lyssikatos
DOI:10.1055/s-0033-1340111
日期:——
A straightforward four-step synthesis of primary-amino-substituted naphthyridine esters from commercially available cyanopyridines was described. The route makes use of a condensation reaction between pyridinyl acetates with N,N-dimethylformamide dimethylacetal (DMF-DMA) to form ortho-cyano vinylogous carbamates. These intermediates can undergo facile cyclization with ammonium acetate in acetic acid to generate the corresponding naphthyridine esters in good synthetic yields. The synthesis of primary-amino-substituted 7-azaquinoxaline was also described.