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- W2206535526 abstract "Muramic acid is found in many peptide natural products containing oligo(poly)saccharide moieties. Taking into consideration that the Fmoc methodology is routinely used for solid-phase peptide synthesis, preparation of orthogonally protected muramic acid building blocks for total solid-phase synthesis of these natural products is of particular practical importance. Herein a simple and efficient synthesis of benzyl 2-amino-4, 6-O-benzylidene-3-O-[(R)-1-carboxyethyl]-2-deoxy-N-9-fluorenylmethyloxycarbonyl-α- D -glucopyranoside (6) from N-acetylglucosamine (1) is described. Important improvements over previous synthetic approaches to glucopyranosides 2 (benzyl 2-acetamido-2-deoxy-α- D -glucopyranoside) and 3 (benzyl 2-acetamido-4, 6-O-benzylidene-2-deoxy-α- D -glucopyranoside), key building blocks in preparation of 6, include synthesis simplification and efficient isolation and purification. Optically pure (S)-2-chloropropionic acid 7 was prepared and introduced to the positon 3-O of sugar moiety to give compound 4 (benzyl 2-acetamido-4, 6-O-benzylidene-3-O-[(R)-1-carboxyethyl]-2-deoxy-α- D -glucopyranoside) with the (R)-configuration of the lactyl side-chain in excellent overall yield and optical purity. Deacetylation of amino group gave compound 5 (benzyl 2-amino-4, 6-O-benzylidene-3-O-[(R)-1-carboxyethyl]-2-deoxy-α-D-glucopyranoside) suitable for incorporation of the Fmoc protecting group to give protected muramic acid derivative 6, a useful building block in peptide synthesis." @default.
- W2206535526 created "2016-06-24" @default.
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- W2206535526 date "2015-01-01" @default.
- W2206535526 modified "2023-10-06" @default.
- W2206535526 title "Synthesis of Orthogonally Protected Muramic Acid Building Blocks for Solid Phase Peptide Synthesis" @default.
- W2206535526 cites W3118434210 @default.
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- W2206535526 doi "https://doi.org/10.5562/cca2591" @default.
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