Table 1.

Structure of the synthesized compounds.

Compd.	R	R′
2a	H	2-OH
2b	H	3-NO2
2c	H	4-OCH3
2d	H	4-N(CH3)2
2e	CH3	4-Cl
2f	H	H
2g	H	4-OH
2h	CH3	H
2i	CH3	4-OH
2j	H	4-Cl
2k	H	3-OH & 4-OCH3
2l	H	2-OCH3