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. Author manuscript; available in PMC: 2014 Apr 10.
Published in final edited form as: J Am Chem Soc. 2008 Jun 18;130(28):8975–8983. doi: 10.1021/ja711248y

Scheme 1a.

Scheme 1a

a Reagents and conditions: (i) NIS, TfOH, DCM, 0 °C (80%); (ii) NaOMe, MeOH (89%); (iii) NIS, TfOH, DCM, 0 °C (76%); (iv) BH3 in THF, Bu2BOTf in DCM, 0 °C (67%).