Synthetic studies on maduropeptin chromophore 2. Synthesis of the madurosamine aryl amide and the C1′C9′ fragments
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Add time:08/06/2019 Source:sciencedirect.com
A retrosynthetic analysis (Scheme 1) of maduropeptin chromophore artifact 1 defined compounds 2 and 3 as required building blocks. The construction of 2 was achieved starting from the 2,5-dimethyl derived aromatic acid 8 and the d-serine derived δ-lactone 12 (Scheme 2), whereas the synthesis of 3 utilized an Evans's aldol condensation reaction between aldehyde 13 and chiral auxiliary 14 (Scheme 3).
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