Table 7.

CDC reaction of tetrahydroisoquinoline with 2-naphthol

Entry	[Cu]	Yield of 20*	Yield of BINOL*
1	Cul	57	13
2	CuCl	51	10
3	CuBr	58	23
4	CuBr2	63	10
5†	CuBr	63	10
6†	CuBr2	72	11
7	CuSO4	53	11
8	Cu(OTf)2	55	15

Tetrahydroisoquinoline (0.1 mmol), 2-naphthol (0.1 mmol), TBHP (0.1 mmol, 5.5 M in decane), and [Cu] (5 mol%): otherwise are mentioned.

*Reported yields were NMR yields using an internal standard.

^†Tetrahydroisoquinoline (0.2 mmol).