Table 1.

Structures of analogues 1–9.

Compd	R1	R2	R3	R4
1a	C6H4-OCH3 (p)	C6H4-O(CH2)3CH3 (p)	OCH3	H
1b	C6H4-OCH3 (m)	C6H4-O(CH2)3CH3 (p)	OCH3	H
2a	C6H4-OCH3 (p)	Cl	C6H4-O(CH2)3CH3 (p)	H
2b	C6H4-OCH3 (m)	Cl	C6H4-O(CH2)3CH3 (p)	H
3a	CO-NH-C6H4-F (p)	H	H	CH3
3b	CO-NH-C6H4-3,4-methlyenedioxy	H	H	CH3
4a	C6H5	NO2	COCH3	C6H5
4b	C6H4-CN (m)	NO2	COCH3	C6H5
5a	C6H5	Cl	COCH3	C6H5
5b	C6H4-CN (m)	Cl	COCH3	C6H5
6a	C6H5	Br	COCH3	C6H5
6b	C6H4-CN (m)	Br	COCH3	C6H5
7	C6H5	COCH3	NH2	C6H5
8	CO-NH-C6H4-Br (p)	CH2-C6H4-(m)CO-NH-C6H4-Br (p)	H	CH3
9	CO-NH-C6H4-Br (p)	N-(C6H4-OCH3)2 (p)	H	CH3