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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: J Am Chem Soc. 2009 Jul 1;131(25):9038–9045. doi: 10.1021/ja902677t

Scheme 10.

Scheme 10

Completion of the Total Synthesis of 4.a

aReagents and Conditions: a) LDA, THF, −78 °C, then PhSeBr; b) mCPBA, CH2Cl2, −78 °C, then Et3N, then warm to rt., 89% (2 steps); c) TBAF, THF, 40 °C, 83%; d) LDA, THF, −78 °C, then PhSeBr; e) mCPBA, CH2Cl2, −78 °C, then Et3N, then warm to rt., 55% (2 steps).