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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Bioorg Med Chem. 2010 Jul 1;18(17):6526–6537. doi: 10.1016/j.bmc.2010.06.074

Scheme 4.

Scheme 4

Synthesis of 14a and 14b.

a Reagents and conditions: (a) NaH, SEM-Cl, rt, 16 h, 68%; (b) (S)-(-) camphanic acid, PPh3, DEAD, rt, 16 h, 88%; (d) Na2CO3, rt, 4 h, 95%.

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