Table 2.

Substrate Scope

entry		R1	R2	product	yield (%)a
1	1a	H	Ph	2a	83
2	1a	H	Ph	2a	79b
3	1b	H	4-Br-C6H4	2b	77
4	1c	H	4-Me-C6H4	2c	84
5	1d	H	4-OMe-C6H4	2d	80
6	1e	H	2-Naphthyl	2e	90
7	1f	OMe	Ph	2f	68
8	1g	Me	Ph	2g	80
9	1h	Br	Ph	2h	77
10	1i	F	Ph	2i	91
11					66
12					66
13					70c

^aIsolated yields.

^b5 mol % of C and DBU. 1.3:1 as observed by 500 MHz ¹H NMR spectroscopy.