. 2010 Feb 6;66(13):2316–2321. doi: 10.1016/j.tet.2010.02.017

Table 2.

Synthesis of 3-(indol-3-yl)-3-hydroxyindolin-2-ones 3a–f in TMGT_f or [BMIM][BF₄]–LiCl ionic liquids

Entry	R¹	R²	Product	Yield (%)
Entry	R¹	R²	Product	[BMIM]BF₄–LiCl	TMGT_f
1	H	H	3a	90	92
2	Me	H	3b	92	93
3	H	Br	3c	88	89
4	Me	Br	3d	90	87
5	H	F	3e	89	90
6	Me	F	3f	91	89