Table 2. Synthesis of spirooxindole derivatives 4(a–g) and 5(a–g).

Entry	R	Product (4)	Yielda (%)	Product (5)	Yielda (%)
1	H	4a	73	5a	80
2	4-F	4b	88	5b	90
3	4-Cl	4c	85	5c	87
4	4-Br	4d	80	5d	83
5	4-CH3	4e	78	5e	80
6	3-Cl	4f	80	5f	85
7	3-CH3	4g	69	5g	70

^aIsolated yield.