Table 3.

Synthesis of indoles and larger ring enamides.^[a]

Entry	Substrate	Product	Yield [%][b]
1	12a, R1, R2 = H, R3 = Ts	13 a, R1, R2 = H, R3 = Ts	66
2[c]	12b, R1 = Me, R2 = H, R3 = Ts	13 b, R1 = Me, R2 = H, R3 = Ts	90
3[c]	12 c, R1 = Ph, R2 = H, R3 = Ts	13 c, R1 = Ph, R2 = H, R3 = Ts	97
4[d]	12 c	13 c	70
5	12d, R1 = H, R2 = Ph, R3 = Ts	13 d, R1 = H, R2 = Ph, R3 = Ts	41
6[c]			95
7[c]			82
8	16	17 (unsaturated)/	94
		18 (saturated)	(5:1)
9[e]		17 (exclusively)	90
10	19		n.r.

^[a]Same conditions as in Table 1 for entry 5 were used, except no external alkene 2 was added.

^[b]Isolated yield.

^[c]Reaction run with 5 mol % Cu(OTf)₂·7.

^[d]Reaction run in the absence of copper.

^[e]Reaction run in CF₃Ph instead of CH₃Ph.