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. Author manuscript; available in PMC: 2014 Sep 4.
Published in final edited form as: J Am Chem Soc. 2013 Aug 22;135(35):10.1021/ja405990z. doi: 10.1021/ja405990z

Scheme 1.

Scheme 1

Synthesis of tetrasaccharide 10.a

aReagents and conditions: (a) Tf2O, DTBP, MS AW-300, CH2Cl2, −78 °C, 86%; (b) DDQ, CH2Cl2, H2O, 83%; (c) thioglycoside 8, NIS/TMSOTf, MS AW-300, CH2Cl2, 0 °C→r.t., (d) AcOH, H2O, 63% (2 steps).