. Author manuscript; available in PMC: 2013 Sep 5.

Published in final edited form as: J Am Chem Soc. 2012 Aug 23;134(35):14334–14337. doi: 10.1021/ja306771n

Table 1.

Identification of the Optimal N-Substituent^a

Unless noted, the reaction was carried out with 1 (0.1 mmol) in CH₂Cl₂ (0.1 mL) in the presence of TEA (0.01 mmol) at rt for 30 min.

Determined by ¹⁹F NMR analysis.