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Beilstein J. Org. Chem. 2016, 12, 1366–1371, doi:10.3762/bjoc.12.130
Graphical Abstract
Figure 1: Bifunctional PEG-HMBPs 1.
Scheme 1: Direct methods for the 1-hydroxyalkylidenebisphosphonic acid synthesis.
Scheme 2: Synthetic strategy of PEG-HMBPs 1.
Scheme 3: Synthesis of PEG-HMBPs 1 and 1’.
Scheme 4: Syntheses of HMBP-PEG-N3 16 and HMBP-PEG-NH3+ 17.
Scheme 5: Synthesis of HMBP-PEG-COOH 23.