Suppr超能文献

通过碳酸铯介导的端基 O-烷基化反应与伯三氟甲磺酸酯立体选择性合成 2-叠氮基-2-脱氧-β-D-甘露糖苷:磷壁酸四糖片段的合成

Stereoselective Synthesis of 2-Azido-2-deoxy-β-d-mannosides via CsCO-Mediated Anomeric O-Alkylation with Primary Triflates: Synthesis of a Tetrasaccharide Fragment of Teichuronic Acid.

作者信息

Bhetuwal Bishwa Raj, Wu Fenglang, Meng Shuai, Zhu Jianglong

机构信息

Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States.

出版信息

J Org Chem. 2020 Dec 18;85(24):16196-16206. doi: 10.1021/acs.joc.0c02370. Epub 2020 Nov 17.

Abstract

Cesium carbonate-mediated anomeric O-alkylation of various protected 2-azido-2-deoxy-d-mannoses with primary triflate electrophiles afforded corresponding 2-azido-2-deoxy-β-mannosides in good yields and excellent anomeric selectivity. In addition, 1,3-dibromo-5,5-dimethylhydantoin was found to be the optimal oxidant for preparation of those 2-azido-2-deoxy-d-mannoses from their corresponding thioglycosides. The utilization of this method was demonstrated in the synthesis of a tetrasaccharide fragment of teichuronic acid containing -acetyl-β-d-mannosaminuronic acid (ManNAcA).

摘要

碳酸铯介导的各种受保护的2-叠氮基-2-脱氧-D-甘露糖与伯三氟甲磺酸酯亲电试剂的端基O-烷基化反应,以良好的产率和优异的端基选择性得到了相应的2-叠氮基-2-脱氧-β-甘露糖苷。此外,发现1,3-二溴-5,5-二甲基海因是由相应的硫代糖苷制备这些2-叠氮基-2-脱氧-D-甘露糖的最佳氧化剂。该方法在含有N-乙酰基-β-D-甘露糖胺糖醛酸(ManNAcA)的磷壁酸四糖片段的合成中得到了应用。

相似文献

9
Direct synthesis of 2-deoxy-β-glycosides via anomeric O-alkylation with secondary electrophiles.
J Am Chem Soc. 2014 Feb 26;136(8):3172-5. doi: 10.1021/ja4116956. Epub 2014 Feb 11.
10
Synthesis of Kdo-alpha-glycosides of lipid A derivatives.
Carbohydr Res. 1993 Aug 17;246:137-59. doi: 10.1016/0008-6215(93)84029-6.

引用本文的文献

6
Stereoselective β-Mannosylation via Anomeric -Alkylation with L-Sugar-Derived Electrophiles.
European J Org Chem. 2021 Dec 28;2021(48):6682-6687. doi: 10.1002/ejoc.202100903. Epub 2021 Nov 12.

本文引用的文献

1
Facile Synthesis of Sugar Lactols via Bromine-Mediated Oxidation of Thioglycosides.
J Carbohydr Chem. 2019;38(2):109-126. doi: 10.1080/07328303.2019.1581889. Epub 2019 Mar 20.
3
Boronic-Acid-Catalyzed Regioselective and 1,2- cis-Stereoselective Glycosylation of Unprotected Sugar Acceptors via Si-Type Mechanism.
J Am Chem Soc. 2018 Mar 14;140(10):3644-3651. doi: 10.1021/jacs.7b12108. Epub 2018 Feb 26.
4
Stereoselective Construction of β-Mannopyranosides by Anomeric O-Alkylation: Synthesis of the Trisaccharide Core of N-linked Glycans.
Angew Chem Int Ed Engl. 2016 Apr 4;55(15):4767-71. doi: 10.1002/anie.201600488. Epub 2016 Mar 7.
5
Deciphering Antigenic Determinants of Streptococcus pneumoniae Serotype 4 Capsular Polysaccharide using Synthetic Oligosaccharides.
ACS Chem Biol. 2016 Feb 19;11(2):335-44. doi: 10.1021/acschembio.5b00768. Epub 2016 Jan 4.
9
Synthesis of Staphylococcus aureus Type 5 trisaccharide repeating unit: solving the problem of lactamization.
Org Lett. 2015 Feb 20;17(4):928-31. doi: 10.1021/acs.orglett.5b00031. Epub 2015 Feb 6.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验