Table 1. Screen of 3,3′-Substituted BINOL Ligands for the Enantioselective para-Claisen Rearrangement of Illicinole (3).

entry	R	temperature	er of 2
1	H	rt	46:54
2	Me	rt	45:55
3	Ph	rt	40:60
4	SiPh3	rt	57:43
5	2,6-dimethylphenyl	rt	40:60
6	1-naphthyl	rt	40:60
7	9-anthracenyl	rt	30:70
8	9-anthracenyl	–40 °C	26:74
9	9-anthracenyl	–60 °C	nr
10	neopentyl	rt	76:24
11	neopentyl	–40 °C	87:13
12	neopentyl	–60 °C	nr
13	methylene-1-adamantyl	–20 °C	84:16
14	methylene-1-adamantyl	–40 °C	nr