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. Author manuscript; available in PMC: 2013 Jan 27.
Published in final edited form as: Angew Chem Int Ed Engl. 2011 Dec 15;51(5):1225–1227. doi: 10.1002/anie.201106969

Table 1.

Screening of Reaction Conditions.

graphic file with name nihms416173u1.jpg
Entry Base Solvent Result[a]
1 LiHMDS DMF trace
2 LiHMDS Et2O N.R.
3 LiHMDS THF 23
4 LiHMDS 1,4-Dioxane N.R.
5 LiOiPr THF N.R.
6 LiOiPr 1,4-Dioxane N.R.
7 NaHMDS THF 40%
8 NaHMDS Et2O 75%
9 NaHMDS 1,4-Dioxane 96%
10 KOtBu THF decomp
11 KOtBu 1,4-Dioxane decomp
[a]

GC yields, using pentadecane as an internal standard.