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. Author manuscript; available in PMC: 2013 May 4.
Published in final edited form as: Org Lett. 2012 Apr 16;14(9):2370–2373. doi: 10.1021/ol300789a

Figure 1.

Figure 1

Experimental 13C KIEs (k12C/k13C, −78 °C) for the reaction of 4 with 5. The two sets of KIEs represent two independent experiments, and the standard deviations from six measurements are indicated in parentheses. A second measurement at the ortho carbon was precluded by interference from solvent C6D6.