211801-79-5Relevant academic research and scientific papers
Developing a library of mannose-based mono-and disaccharides: A general chemoenzymatic approach to monohydroxylated building blocks
Bavaro, Teodora,Marzatico, Sara,Recca, Teresa,Robescu, Marina Simona,Tanzi, Lisa,Terreni, Marco,Zhang, Yongmin
, (2021/06/14)
Regioselective deprotection of acetylated mannose-based mono-and disaccharides differently functionalized in anomeric position was achieved by enzymatic hydrolysis. Candida rugosa lipase (CRL) and Bacillus pumilus acetyl xylan esterase (AXE) were immobilized on octyl-Sepharose and glyoxyl-agarose, respectively. The regioselectivity of the biocatalysts was affected by the sugar structure and functionalization in anomeric position. Generally, CRL was able to catalyze regioselective deprotection of acetylated monosaccharides in C6 position. When acetylated disaccharides were used as substrates, AXE exhibited a marked preference for the C2, or C6 position when C2 was involved in the glycosidic bond. By selecting the best enzyme for each substrate in terms of activity and regioselectivity, we prepared a small library of differently monohydroxylated building blocks that could be used as intermediates for the synthesis of mannosylated glycoconjugate vaccines targeting mannose receptors of antigen presenting cells.
A Concise Synthesis of Oligosaccharides Derived From Lipoarabinomannan (LAM) with Glycosyl Donors Having a Nonparticipating Group at C2
Li, Zhihao,Zheng, Changping,Terreni, Marco,Bavaro, Teodora,Sollogoub, Matthieu,Zhang, Yongmin
supporting information, p. 2033 - 2044 (2020/03/04)
Mycobacteria infection resulting in tuberculosis (TB) is one of the top ten leading causes of death over the world, and lipoarabinomannan (LAM) has been confirmed to play significant roles in this process. In this study, a convenient synthetic approach ha
Synthesis of disaccharide modified berberine derivatives and their anti-diabetic investigation in zebrafish using a fluorescence-based technology
Jin, Meng,Kong, Haotian,Li, Xiaobin,Lin, Houwen,Liu, Kechun,Stoika, Rostyslav,Wang, Lizhen
, p. 3563 - 3574 (2020/05/25)
Berberine is a naturally occurring isoquinoline alkaloid and has been used as an important functional food additive in China due to its various pharmacological activities. Berberine exhibits great potential for developing anti-diabetic agents against type
Stereoselective Phenylselenoglycosylation of Glycals Bearing a Fused Carbonate Moiety toward the Synthesis of 2-Deoxy-β-galactosides and β-Mannosides
Li, Zhongjun,Meng, Shuai,Yao, Wang,Zhong, Wenhe
supporting information, (2020/04/09)
A phenylselenoglycosylation reaction of glycal derivatives mediated by diphenyl diselenide and phenyliodine(III) bis(trifluoroacetate) under mild conditions is described. Stereoselective glycosylation has been achieved by installing fused carbonate on those glycals. 3,4-O-Carbonate galactals and 2,3-O-carbonate 2-hydroxyglucals are converted into corresponding glycosides in good yields with excellent β-selectivity, resulting in 2-phenylseleno-2-deoxy-β-galactosides and 2-phenylseleno-β-mannosides which are good precursors of 2-deoxy-β-galactosides and β-mannosides, respectively.
Triflic acid-mediated synthesis of thioglycosides
Escopy, Samira,Singh, Yashapal,Demchenko, Alexei V.
supporting information, p. 8379 - 8383 (2019/09/30)
An efficient synthesis of thioglycosides from per-acetates in the presence of triflic acid is described. The developed protocol features high reaction rates and product yields. Some reactive sugar series give high efficiency in the presence of sub-stoichiometric trifluoromethanesulfonic acid (TfOH) in contrast to other known protocols that require multiple equivalents of Lewis acids to reach high conversion rates.
Phosphoryl mannopentaose and derivatives thereof, and preparation methods and application thereof
-
Paragraph 0136; 0138, (2017/06/02)
The invention provides phosphoryl mannopentaose as shown in a formula (I) and derivatives as shown in formula (II) to (XI) of phosphoryl mannopentaose, and preparation methods thereof. According to the preparation methods, reactivity is regulated and cont
Glycosylated Platinum(IV) Complexes as Substrates for Glucose Transporters (GLUTs) and Organic Cation Transporters (OCTs) Exhibited Cancer Targeting and Human Serum Albumin Binding Properties for Drug Delivery
Ma, Jing,Wang, Qingpeng,Huang, Zhonglv,Yang, Xiande,Nie, Quandeng,Hao, Wenpei,Wang, Peng George,Wang, Xin
supporting information, p. 5736 - 5748 (2017/07/22)
Glycosylated platinum(IV) complexes were synthesized as substrates for GLUTs and OCTs for the first time, and the cytotoxicity and detailed mechanism were determined in vitro and in vivo. Galactoside Pt(IV), glucoside Pt(IV), and mannoside Pt(IV) were highly cytotoxic and showed specific cancer-targeting properties in vitro and in vivo. Glycosylated platinum(IV) complexes 5, 6, 7, and 8 (IC50 0.24-3.97 μM) had better antitumor activity of nearly 166-fold higher than the positive controls cisplatin (1a), oxaliplatin (3a), and satraplatin (5a). The presence of a hexadecanoic chain allowed binding with human serum albumin (HSA) for drug delivery, which not only enhanced the stability of the inert platinum(IV) prodrugs but also decreased their reduction by reductants present in human whole blood. Their preferential accumulation in cancer cells compared to noncancerous cells (293T and 3T3 cells) suggested that they were potentially safe for clinical therapeutic use.
InBr 3 -Catalyzed Synthesis of Aryl 1,2- trans -Thio(seleno)glycosides
Ma, Teng,Li, Changwei,Liang, Haijing,Wang, Zhaoyan,Yu, Lan,Xue, Weihua
supporting information, p. 2311 - 2314 (2017/10/06)
InBr 3 is demonstrated to be an efficient catalyst for reactions of fully acetated aldoses with aryl mercaptans or selenophenol at room temperature, rapidly furnishing the corresponding thioglycosides or selenoglycosides with exclusively 1,2- t
Cu(ClO4)2·6H2O catalyzed solvent free per-O-acetylation and sequential one-pot conversions of sugars to thioglycosides
Chatterjee, Debnath,Paul, Abhijit,Rajkamal,Yadav, Somnath
, p. 29669 - 29674 (2015/05/20)
The solvent free per-O-acetylation of various reducing and non-reducing sugars has been carried out using stoichiometric amounts of acetic anhydride and copper(ii) perchlorate hexahydrate as the catalyst. The reactions with various reducing monosaccharides have also been followed by a one-pot sequential conversion to the corresponding thioglycosides in high yields. This journal is
Efficient assembly of oligomannosides using the hydrophobically assisted switching phase method
Meng, Shuai,Tian, Tian,Han, Dong,Wang, Lin-Na,Tang, Shao-Geng,Meng, Xiang-Bao,Li, Zhong-Jun
supporting information, p. 6711 - 6722 (2015/06/25)
The hydrophobically assisted switching phase (HASP) method was applied in the assembly of oligomannosides. A new mannosyl donor with high reactivity was selected after a series of optimization studies, which was suitable for the synthesis of oligomannosides via the HASP method. The practicability of the HASP method towards the synthesis of branched oligosaccharides was explored and two branched penta-mannosides were assembled efficiently.
