Table 2.

Synthesis of 1,3,5-triaryl-2-pyrazolines in the NaAc-HAc aqueous under ultrasound irradiation*

Entry	Ar 1	Ar 2	T (°C)	Time (h)	Yield (%)	M.P. (°C) [lit.]
a	C6H5	4-CH3OC6H4	28–33	1.5	96	110–112
b	C6H5	4-CH3C6H4	29–33	2	88	128–130
c	C6H5	C6H5	32–36	2	96	134–135(134–135) [9]
d	C6H5	4-ClC6H4	29–33	2	86	135–136(133–134) [7]
e	C6H5	3-ClC6H4	29–33	2	83	134–136
f	C6H5	2-ClC6H4	28–33	2	85	134–135(135–136) [7]
g	C6H5	3-BrC6H4	29–33	2	83	141–143
h	C6H5	4-O2NC6H4	28–34	3	trace
i	4-ClC6H4	C6H5	28–33	2	85	143–145
j	3-O2NC6H4	C6H5	28–33	3	trace

* The preparation of chalcones was referred to [14]