Table 1.

Enantioselective catalytic diacetoxylation of styrenes: Optimization.

En‐	Catalyst	Loading	Yield	ee
try[a]		[mol %]	[%][a]	[%][b]
1		20	61	84
2		20	58	83
3		10	43	83
4		10	57	83
5		10	55	86
6		10[c]	71	85
7		5[c]	61	83

[a] Yield after purification. [b] Determined by HPLC on chiral stationary phase after conversion into the free diol. [c] With additional 5 mol % of TfOH.