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. Author manuscript; available in PMC: 2012 Sep 15.
Published in final edited form as: Bioorg Med Chem Lett. 2011 Jul 14;21(18):5347–5352. doi: 10.1016/j.bmcl.2011.07.026

Scheme 1.

Scheme 1

Reagents and conditions: (a) FITC, Et3N, DMF, rt, 12 h, 40%; (b) Texas Red sulfonyl chloride, DMF, 0-10°C, 12 h, 61%; (c) DMF, rt, 20 h, 47%.