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. Author manuscript; available in PMC: 2009 Sep 10.
Published in final edited form as: J Am Chem Soc. 2004 Aug 4;126(30):9248–9256. doi: 10.1021/ja048299z

Scheme 2.

Scheme 2

Synthesis of NP-DO3AMa

a Reagents and conditions: i. (Boc)2O/CHCl3 (90%), ii. BnOCOCl/Et3N/CHCl3 (98%), iii. HCl/MeOH (94%), iv. BrCH2CONH2/MeCN/K2CO3 (90%), v. H2/10% Pd on C/EtOH (99%), vi. 2-hydroxyl-5-nitrobenzyl bromide/K2CO3/EtOH (65%).