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. Author manuscript; available in PMC: 2007 Sep 25.
Published in final edited form as: Carbohydr Res. 2006 Jan 26;341(10):1669–1679. doi: 10.1016/j.carres.2006.01.007

Scheme 3.

Scheme 3

Preparation of donors 17–19. Reagents and conditions: (i) NaH, TBAI, DMF, MS; BnBr, 2 h, rt; (ii) TBSOTf, 2,6-lutidine, DCM, 4 h, 0 °C; (iii) TMSOTf, BH3·THF, 4 h, −20 to 0 °C.