Table 5.

GBB-3CR involving ethyl 2-isocyanoacetate.

Entry	Starting materials				Product	Yield, %
	Aldehydes	R1	Aminopyrazoles	R2
1	1d	4-CH3O	2a	4-F	6a	77
2	1e	4-Cl	2a	4-F	6b	95
3	1f	4-CO2CH3	2a	4-F	6c	67
4	1g	4-NO2	2a	4-F	6d	85
5	1d	4-CH3O	2b	3-F	6e	78
6	1e	4-Cl	2b	3-F	6f	84
7	1f	4-CO2CH3	2b	3-F	6g	82
8	1g	4-NO2	2b	3-F	6h	80