Table 4. Substrate Scope for 5-Substituted Oxazoles Derivatives 4^a.

^aThe reactions were performed with aldehyde (3 mmol), tosmic (3 mmol), and K₃PO₄ (6 mmol) at 65 °C.

^bIsolated yield.

^cMicrowave reactions were carried out in a microwave model no. CATA R (Catalyst Systems, Pune) using a power of 350 W.