Table 1.

Synthesis of 2-oxazolines 4b from carboxylic acids 1 using open vessel mode microwave heating

Entry	Acid	Oxazoline product	Reaction conditions	% Yield
1			170 °C, 15 min	85
2			170 °C, 15 min	78
3			170 °C, 15 min	79
4			170 °C, 15 min	83
5			170 °C, 15 min	81
6			170 °C, 15 min	73
7			170 °C, 15 min	71
8			170 °C, 15 min	80
9			170 °C, 25 min	78
10			170 °C, 25 min	82
11			170 °C, 40 min	73
12			170 °C, 25 min	78