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. Author manuscript; available in PMC: 2006 May 15.
Published in final edited form as: J Am Chem Soc. 2005 Apr 27;127(16):5766–5767. doi: 10.1021/ja043743j

Table 1.

Hydroboration of β-methylstyrene with L·BH2X

graphic file with name nihms-9400-0003.jpg
entry L·BH3a activation time (h) 7:8 yield (%)
1 Py·BH3 I2b 2 15:1 92
2 Py·BH3 Br2b 12 >20:1 10d
3 Py·BH3 TfOHc 2 10:1 72
4 Py·BH3 HNTf2c 2 10:1 90
5 Lut·BH3 I2b 2 2.4:1 13d
6 Me2S·BH2Ie 2 3.5:1 62
a

1:1 ratio, L·BH3/alkene, room temperature.

b

50 mol %.

c

100 mol %.

d

Reaction quenched prior to completion.

e

Preformed (ref 7).