Synthesis of the Branched Tetrasaccharide Fragment of Saccharomicin A
作者:Brian P. Garreffi、Akash P. Maney、Clay S. Bennett
DOI:10.1021/acs.orglett.2c04081
日期:2023.1.20
A synthesis of the branched tetrasaccharide fragment of saccharomicin A using 1-OTBS donors to stereoselectively synthesize both α- and β-linked disaccharides is reported. The disaccharides were united using BSP/Tf2O to afford the tetrasaccharide fragment as a single α-anomer in 72% yield. This branched tetrasaccharide fragment can be used as donor and acceptor species to synthesize larger fragments
报道了使用 1-OTBS 供体立体选择性合成 α- 和 β- 连接的二糖来合成 saccharomicin A 的支链四糖片段。使用 BSP/Tf 2 O 联合二糖,以 72% 的收率提供作为单一 α-端基异构体的四糖片段。这种支链四糖片段可用作供体和受体物质,以合成更大的糖霉素 A 片段。
Total Synthesis of a Structurally Complex Tetrasaccharide Repeating Unit of <i>Vibrio cholerae</i> O43
作者:Ankita Paul、Diksha Rai、Kabita Pradhan、Preeti Balhara、Amar Kumar Mishra、Suvarn S. Kulkarni
DOI:10.1021/acs.orglett.3c02430
日期:2023.9.1
Herein we report the first total synthesis of a densely functionalized tetrasaccharide repeatingunit of Vibrio cholerae O43, which contains rare deoxy amino sugars d-quinovosamine and d-viosamine attached with the rare amino acid N-acetyl-l-allothreonine. Synthesis of orthogonally protected rare sugars and unnatural amino acid building blocks, stereoselective construction of three consecutive 1,2-cis
Total Synthesis of Vibrio Cholerae O43 Tetrasaccharide Repeating Unit
作者:Kabita Pradhan、Ankita Paul、Diksha Rai、Amar Kumar Mishra、Preeti Balhara、Suvarn S. Kulkarni
DOI:10.1021/acs.joc.3c02886
日期:2024.3.15
unit (RU) of V. cholerae O43 is decorated with less-explored rare deoxy amino sugars like d-quinosamine and d-viosamine, along with a rare amino acid, N-acetyl-l-allothreonine. Herein, we report a detailed account of the total synthesis of V. cholerae O43 tetrasaccharide RU. In our earlier attempt, while a one-pot assembly of trisaccharide was successful, the final coupling with a fully functionalized