Table 1. Reaction Development^a.

entry	deviation from optimized conditions	time (h)	yield (%)
1	noneb	1	87
2	no AcOH	25	complex
3	20 mol % of AcOH in PhMe	2	complex
4	20 mol % of BzOH in PhMe	2	complex
5	5 equiv of AcOH in PhMe	3	30
6	10 equiv of AcOH in PhMe	3	38
7	20 equiv of AcOH in PhMe	1.5	57
8	PhMe/AcOH = 3:1c	1.5	84
9	PhMe/AcOH = 1:3d	3.5	80
10	AcOH as solvente	3.5	73
11	0.2 M conc	1	71
12	0.05 M conc	1.5	87

^aReactions were performed on a 0.2 mmol scale. All yields correspond to isolated yields.

^bCorresponds to 87.5 equiv of AcOH.

^c44 equiv of AcOH.

^d131 equiv of AcOH.

^e175 equiv of AcOH.