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. Author manuscript; available in PMC: 2011 May 13.
Published in final edited form as: J Med Chem. 2010 May 13;53(9):3602–3610. doi: 10.1021/jm901872v

Scheme 3.

Scheme 3

Reagents and conditions: (a) (i) (COCl)2, CH2Cl2, (ii) (CF3CO)2O or (C2F5CO)2O or (C3F7CO)2O, pyridine, CH2Cl2; (b) C2H5OOCCH=CHCH2P(=O)(OC2H5)2, LiOH, THF; (c) H2, 10% Pd/C; (d) NaOH, CH3OH; (e) Br(CH2)3COOEt, K2CO3, acetone.