Table 1.

Tandem oxidative cyclization of compound 3.

Sr. No.	Reaction conditions	Time (h)	Yield of 1 (%)
1	Ru(bpz)3(PF6)2 (0.1 equiv), (NH4)2S2O8 (2 equiv), CH3CN, Ar, blue LED, r.t	18	Decomposed
2	Acridinium (0.1 equiv), TBHP (2 equiv), CH3CN, Ar, blue LED, r.t	48	Decomposed
3	CAN (2.5 equiv), CH3CN, Ar, 0 °C	2	Decomposed
4	Mn(OAc)3·2H2O (4 equiv), CH3CN, Ar, reflux	5	Decomposed
5	PIFA (1.2 equiv), HFIP, Ar, r.t	4	Decomposed
6a	Glassy carbon anode, Glassy carbon cathode, 0.1M LiClO4, 1.25 V	18	–
7a	Platinum anode, Glassy carbon cathode, 0.1MLiClO4,1.25 V	10	–

^aPassivation of electrode observed.