Table 1. Selected optimization experiments of the reaction.

Entry	Solvent	Conc. (M)	Yield a (%)
1	THF	1	22
2	Et2O	1	25
3	Hexanes	1	14
4	Xylenes	1	14
5	DMF	1	1
6	CH3CN	1	25
7	CH2Cl2	1	26
8	CH2Cl2	0.1	6
9	CH2Cl2	0.5	7
10	CH2Cl2	1.5	10
11	CH2Cl2	2.0	13
12	—	—	19

^aHPLC yield. 9,10-Diphenylanthracene was used as an internal standard.