Table 1.

Chemical structures of starting isatins and isatoic anhydrides.

Compd.	R1	Compd.	R1	Compd.	R2
1a	H	1g	4-CH3	2a	H
1b	5-NO2	1h	6-CH3	2b	6-Br
1c	5-Br	1i	5-CH3	2c	6-CF3
1d	5-Et	1j	6-OCH3	2d	7-Br
1e	5-OCH3	1k	6-Br	2e	7-f
1f	5-C6H5	1l	4-Br	2f	7-NO2
				2g	6-NO2