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. 2014 Sep 8;136(38):13146–13149. doi: 10.1021/ja507054j

Table 2. Optimization of the Catalyst.

graphic file with name ja-2014-07054j_0006.jpg

entry catalyst NMR yield, % 5a:6a
1 Ph3PAuCl/AgSbF6 >99 50:50
2 Ph3PAuCl/AgOTf 85 82:18
3 (ArO)3PAuCla/AgOTfb,c 81d 96:4e
4 (ArO)3PAuCla/AgSbF6b 76 22:78
5 IPrAuCl/AgOTf 79 33:67
6 IPrAuCl/AgSbF6 81 0:100
7 AgOTfb 39 87:13
8 AgSbF6 39 86:14
a

Ar = 2,4-di-tBuPh.

b

Solution [0.04M].

c

T = −30 °C.

d

76% NMR yield at rt.

e

Ratio of 91:9 at rt.