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. Author manuscript; available in PMC: 2011 May 27.
Published in final edited form as: Carbohydr Res. 2010 Mar 21;345(8):999–1007. doi: 10.1016/j.carres.2010.03.025

Scheme 1.

Scheme 1

(a) Piperidine, THF, rt, 95%; (b) DBU, Cl3CCN, DCM, 0 °C, 71%; (c) hydrazine acetate, DCM–MeOH (10:1, v/v), rt, 86%; (d) 10, TMSOTf, 4 Å MS, toluene–DCM (3:1, v/v), rt, 76%; (e) piperidine, THF, 0 °C to rt, 75%; (f) DBU, Cl3CCN, DCM, 0 °C to rt, 84%.