An Efficient and Green Method for Synthesis of 2,4,5-Triarylimidazoles without Use of Any Solvent, Catalyst, or Solid Surface

Table 1

Synthesis of 2,4,5-triarylimidazoles (3) under catalyst-free and solvent-free conditions.

Entry	Starting materials		Product	Time (h)	Yield (%)	M. P. (Lit.); reference
	1 with; Ar^1 =	2 with; Ar^2 =
1	C6H5	C6H5	3a	3	80	272-273 (272–274) [19]
2	C6H5	4-CH3-C6H4	3b	3	75	227-228 (227-228) [19]
3	C6H5	4-Cl-C6H4	3c	3	78	261-262 (261-262) [19]
4	C6H5	4-Br-C6H4	3d	3	81	245-246 (244–246) [19]
5	C6H5	4-CH3O-C6H4	3e	3	76	226-227 (227-228) [19]
6	C6H5	3,4-(OCH2O)C6H3	3f	3	73	248–250 (248–250) [19]
7	C6H5	3-O2N-C6H4	3g	3	90	>300 (>290) [19]
8	C6H5	4-(CH3)2N-C6H4-	3h	3	45	256–258 (257-258) [19]
9	C6H5	3-CH3O,4-HO-C6H3-	3i	5	67	165–167 (166) [28]
10	C6H5	2-Thienyl	3j	4	67	261–263 (260–262) [29]
11	C6H5	3-Pyridyl	3k	3	66	245–247 (244–246) [30]
12	4-CH3-C6H4-	C6H5	3l	5	59	252-253 (254) [31]
13	4-CH3-C6H4-	4-Cl-C6H4	3m	5	64	262-263 (263-264) [32]
14	4-CH3-C6H4-	4-CH3O-C6H4	3n	6	61	250-251 (250-251) [33]