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. Author manuscript; available in PMC: 2013 Oct 10.
Published in final edited form as: J Am Chem Soc. 2012 Oct 1;134(40):16856–16868. doi: 10.1021/ja307861n

Table 2.

Preparation of Potassium 1-(Acyloxy)alkyltrifluoroborates.

graphic file with name nihms411884u2.jpg
Entry RBF3K Isolated Yield (%)
1 graphic file with name nihms411884t21.jpg 5a 87
2 graphic file with name nihms411884t22.jpg 5b 86
3 graphic file with name nihms411884t23.jpg 5c 95
4 graphic file with name nihms411884t24.jpg 5d 92a

Reaction conditions: 1.0 equiv of trifluoroborate, 1.5 equiv of KH, 1.5 equiv of electrophile, THF, rt, o/n.

a

K2CO3 as base, 0 °C to rt, Ac2O in place of AcCl. (Cb = CONiPr2)