The yields of synthesized products (4a–4u) using different derivatives of isatin, 3-aminopyrazole and isocyanide in the presence of CeCl₃·7H₂O catalyst^a.

Entry	Pyrazole	Isatin	Isocyanide	Product	Yield (%)
1				4a	78
2				4b	76
3				4c	80
4				4d	77
5				4e	75
6				4f	82
7				4g	74
8				4h	73
9				4i	74
10				4j	77
11				4k	79
12				4l	81
13				4m	81
14				4n	82
15				4o	80
16				4p	81
17				4q	75
18				4r	79
19				4s	75
20				4t	74
21				4u	63

^aIsolated yield in the presence of CeCl₃·7H₂O catalyst (30 mol%).