Table 2.

The preparation of ylides 2 and imidazolethiones 13.

entry	R1	R2	R3	1	2, yield, %	13, yield, %
1	Ph	Ph	Me	1a	2a, 71	13a, 80
2	Ph	4-ClC6H4	Me	1b	2b, 86	13b, 81
3	Ph	4-NO2C6H4	Me	1c	2c, 98	13c, 93
4	4-BrC6H4	3-BrC6H4	Me	1d	2d, 80	13d, 92
5	Ph	Ph	Ph	1e	2e, 91	13e, 91
6	Ph	4-BrC6H4	Ph	1g	2f, 94	13f, 80
7	Me	4-MeOC6H4	Ph	1i	2g, 82	13g, 90
8	Ph	4-FC6H4	Bn	1l	2h, 88	–
9	Ph	4-ClC6H4	Bn	1m	2i, 95	13h, 80