Table 6.

Ugi-4CR involving 3-amino-5-methylisoxazole.

Entry	Starting materials		Product	Yieldb, %
	Aldehydes	R1
1	1a	H	9a	49
2	1b	2-CH3O	9b	67
3	1c	3-CH3O	9c	51
4	1d	4-CH3O	9d	73
5	1e	4-Cl	9e	43
6	1f	4-CO2CH3	9f	43
7	1g	4-NO2	10ga	–b
8	1h	4-CN	9h	18

^a9g was not isolated; ^bthe yields are indicated for compounds 9.