Synthesis of new N-Benzoxazole and N-Benzothiazole derivatives of 3-(4-Substituted- phenyl)aminoisoxazol-5(2H)-ones and comparison of their base induced rearrangement

3-Arilaminoisoxazol-5(2H)-onas, substituídas no nitrogênio com grupos benzoxazol e benzotiazol, reagem com trietilamina em etanol, sob refluxo, fornecendo os correspondentes derivados indol e imidazobenzotiazol, respectivamente.