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. Author manuscript; available in PMC: 2013 Oct 29.
Published in final edited form as: Chem Sci. 2011 Jun 20;2(8):10.1039/C1SC00221J. doi: 10.1039/C1SC00221J

Table 1.

graphic file with name nihms507915u1.jpg
Entry Temp. (°C) Base (equiv) Time Yielda e.r.
1 −40 9 16 h 36 77.5:22.5
2 −40 7.5 24 h 25 (41) 82.5:17.5
3 −25 9 4 h 44 77.0:23.0
4 −25 7.5 10 h 21 (35) 79.5:20.5
5 0 6 4 h 19 (26) 75.5:24.5
6 0 4.5 8 h 50 (71) 70.5:29.5
a

Values in parentheses are yields based on recovered starting material.