Table 2.

Yields of the title compounds 4 ^a.

Compd.	R1-	R2-	R3-	Yields /% b
4a	2-F	4-CF3C6H5	CH3	83.5
4b	H	4-CF3C6H5	CH3	81.3
4c	2-F	6-methoxybenzothiazole-2-yl	CH3	76.5
4d	2-F	3-NO2C6H5	CH3	79.8
4e	3,4,5-trimethoxy	4-CF3C6H5	CH3	70.6
4f	4-F	4-CF3C6H5	CH3	73.6
4g	2-CF3	4-CF3C6H5	CH3	56.8
4h	3-CF3	4-CF3C6H5	CH3	79.2
4i	3,4,5-trimethoxy	4-CF3C6H5	C2H5	78.6
4j	2-F	4-CF3C6H5	C2H5	81.6
4k	H	4-CF3C6H5	C2H5	82.8
4l	2-F	3-NO2C6H5	C2H5	80.5

^a Reaction conditions: stirred under microwave irradiation in a Discovery^TM LabMate instrument at 50W; ^b Yields of isolated products.