Table 2.

Entry	Cmpd	R2	Ar	Yield (%)a
1	7a	H	phenyl	86
2	7b	H	4-fluorophenyl	75
3	7c	H	3-methoxyphenyl	62
4	7d	H	4-methylphenyl	68
5	7e	H	4-methoxyphenyl	84
6	7f	H	4-aminophenyl	90
7	7g	H	3-aminophenyl	86
8	7h	H	2-aminophenyl	73
9	7i	H	3-fluorophenyl	65
10	7j	H	3-nitrophenyl	97
11	7k	H	2-methoxyphenyl	30
12	7l	H	2-fluorophenyl	28
13	7m	H	2-pyridyl	98
14	7n	3-Cl	phenyl	93
15	7o	3-methyl	phenyl	73
16	7p	3-CF3	phenyl	80
17	7q	2,4-difluoro	phenyl	98
18	7r	3-pyridyl	phenyl	94

^aIsolated yield