Synthesis of 4-aminoisoxazole-3-carboxamides using base-promoted nitrosation of N-substituted cyanoacetamides
摘要:
The reactions of N-substituted cyanoacetamides with EtONO in the presence of an equimolar amount of EtONa afforded the corresponding sodium salts of hydroxyiniino derivatives in 70-95% yields. The latter were transformed into 4-amino-5-(4-bromobenzoyl)isoxazole-3-carboxamides in 30-57% yields using the known method.