Month: November 2022

On November 1, 2019, Li, Qingjiang; Jiang, Wenjie; Guo, Jiatong; Jaiswal, Mohit; Guo, Zhongwu published an article.Formula: C13H14N2O8 The title of the article was Synthesis of Lewis Y Analogues and Their Protein Conjugates for Structure-Immunogenicity Relationship Studies of Lewis Y Antigen. And the article contained the following:

Analogs of cancer-associated Lewis Y (Ley) antigen with varying structures at the reducing end were synthesized by a highly efficient strategy involving one-pot preactivation-based iterative glycosylation to obtain the key tetra-/pentasaccharide intermediates, which was followed by stereoselective fucosylation. After global deprotection, these oligosaccharides were coupled with carrier protein keyhole limpet hemocyanin. The resultant glycan-protein conjugates were subjected to immunol. studies in mice. It was disclosed that the conjugate of the pentasaccharide analog of Lewis Y antigen was more immunogenic than that of the hexasaccharide analog, but the antisera of both conjugates could indiscriminately recognize each carbohydrate hapten. These results suggested that the short Lewis Y analog may be utilized to develop functional conjugate cancer vaccines. More importantly, the results also proved that the reducing-end glucose residue in the hexasaccharide analog of Lewis Y was probably not involved in its interaction with the immune system, whose discovery can have a broad impact on the design of new cancer vaccines. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Formula: C13H14N2O8

The Article related to lewis y analog protein conjugate structure immunity relationship, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Formula: C13H14N2O8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On December 15, 2017, Zheng, Ruixiang Blake; Jegouzo, Sabine A. F.; Joe, Maju; Bai, Yu; Tran, Huu-Anh; Shen, Ke; Saupe, Jorn; Xia, Li; Ahmed, Faiaz Md.; Liu, Yu-Hsuan; Patil, Pratap Subhashrao; Tripathi, Ashish; Hung, Shang-Cheng; Taylor, Maureen E.; Lowary, Todd L.; Drickamer, Kurt published an article.Electric Literature of 707-07-3 The title of the article was Insights into Interactions of Mycobacteria with the Host Innate Immune System from a Novel Array of Synthetic Mycobacterial Glycans. And the article contained the following:

An array of homogeneous glycans representing all the major carbohydrate structures present in the cell wall of the human pathogen Mycobacterium tuberculosis and other mycobacteria has been probed with a panel of glycan-binding receptors expressed on cells of the mammalian innate immune system. The results provide an overview of interactions between mycobacterial glycans and receptors that mediate uptake and survival in macrophages, dendritic cells, and sinusoidal endothelial cells. A subset of the wide variety of glycan structures present on mycobacterial surfaces interact with cells of the innate immune system through the receptors tested. Endocytic receptors, including the mannose receptor, DC-SIGN, langerin, and DC-SIGNR (L-SIGN), interact predominantly with mannose-containing caps found on the mycobacterial polysaccharide lipoarabinomannan. Some of these receptors also interact with phosphatidyl-myo-inositol mannosides and mannose-containing phenolic glycolipids. Many glycans are ligands for overlapping sets of receptors, suggesting multiple, redundant routes by which mycobacteria can enter cells. Receptors with signaling capability interact with two distinct sets of mycobacterial glycans: targets for dectin-2 overlap with ligands for the mannose-binding endocytic receptors, while mincle binds exclusively to trehalose-containing structures such as trehalose dimycolate. None of the receptors surveyed bind furanose residues, which often form part of the epitopes recognized by antibodies to mycobacteria. Thus, the innate and adaptive immune systems can target different sets of mycobacterial glycans. This array, the first of its kind, represents an important new tool for probing, at a mol. level, biol. roles of a broad range of mycobacterial glycans, a task that has not previously been possible. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Electric Literature of 707-07-3

The Article related to mycobacterium surface glycan array host innate immuninty interaction, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Electric Literature of 707-07-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Yisheng; Wang, Subo; Wang, Guirong; Li, Hui; Guo, Zhongwu; Gu, Guofeng published an article in 2019, the title of the article was Synthesis and immunological studies of group A Streptococcus cell-wall oligosaccharide-streptococcal C5a peptidase conjugates as bivalent vaccines.Formula: C10H14O3 And the article contains the following content:

Group A Streptococcus (GAS) cell-wall polysaccharides and streptococcal C5a peptidase (ScpA) are identified as potential target antigens for the development of anti-GAS vaccines. Structurally well-defined mono-, di-, and trimers of the trisaccharide repeating unit of the major and conserved cell-wall polysaccharide of various GAS serotypes were synthesized by a convergent and efficient strategy. These synthetic oligosaccharides, which had a free amino group at the reducing end, were conjugated with a novel ScpA mutant ScpA193 protein through the bifunctional glutaryl linker. The resultant neoglycoproteins were evaluated as conjugate vaccines and compared with other glycoconjugates using the common carrier proteins diphtheria toxin mutant CRM197 and tetanus toxoid (TT). Immunol. studies using mice revealed that the ScpA193 conjugates could stimulate not only robust GAS oligosaccharide-specific antibody responses that were comparable to the immunol. activities of CRM197 and TT conjugates but also robust ScpA193-specific antibodies, making the ScpA193-oligosaccharide conjugates promising bivalent anti-GAS vaccine candidates. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Formula: C10H14O3

The Article related to tetanus crm197 scpa193 streptococcus polysaccharide conjugate vaccine, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Formula: C10H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Yisheng; Wang, Subo; Wang, Guirong; Li, Hui; Guo, Zhongwu; Gu, Guofeng published an article in 2019, the title of the article was Synthesis and immunological studies of group A Streptococcus cell-wall oligosaccharide-streptococcal C5a peptidase conjugates as bivalent vaccines.Electric Literature of 79642-50-5 And the article contains the following content:

Group A Streptococcus (GAS) cell-wall polysaccharides and streptococcal C5a peptidase (ScpA) are identified as potential target antigens for the development of anti-GAS vaccines. Structurally well-defined mono-, di-, and trimers of the trisaccharide repeating unit of the major and conserved cell-wall polysaccharide of various GAS serotypes were synthesized by a convergent and efficient strategy. These synthetic oligosaccharides, which had a free amino group at the reducing end, were conjugated with a novel ScpA mutant ScpA193 protein through the bifunctional glutaryl linker. The resultant neoglycoproteins were evaluated as conjugate vaccines and compared with other glycoconjugates using the common carrier proteins diphtheria toxin mutant CRM197 and tetanus toxoid (TT). Immunol. studies using mice revealed that the ScpA193 conjugates could stimulate not only robust GAS oligosaccharide-specific antibody responses that were comparable to the immunol. activities of CRM197 and TT conjugates but also robust ScpA193-specific antibodies, making the ScpA193-oligosaccharide conjugates promising bivalent anti-GAS vaccine candidates. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Electric Literature of 79642-50-5

The Article related to tetanus crm197 scpa193 streptococcus polysaccharide conjugate vaccine, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Electric Literature of 79642-50-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhong, Jiaxin; He, Haibing; Gao, Shuanhu published an article in 2019, the title of the article was Exploration of 1,3-dipolar cycloaddition reactions to construct the core skeleton of Calyciphylline A-type alkaloids.Formula: C7H10O3 And the article contains the following content:

Nitrone induced 1,3-dipolar [3+2] cycloadditions were studied to construct the core structure of Calyciphylline A-type Daphniphyllum alkaloids. This approach is capable of installing the cis-hydroindole A-C ring as well as the spiro-A-C-E ring with the all-carbon quaternary centers at C-5 and C-8, and has been successfully used in the total synthesis of himalensine A. It also lays the foundation for the synthesis of challenging Calyciphylline A-type alkaloids, such as daphniyunnine A. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Formula: C7H10O3

The Article related to calyciphylline a daphniphyllum alkaloid preparation nitrone dipolar cycloaddition, Alkaloids: Alkaloids Containing One Nitrogen Atom In A Ring and other aspects.Formula: C7H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On July 16, 2021, Xu, Yuan-Ze; Wen, Qi-Ling; Sha, Feng; Li, Qiong; Wu, Xin-Yan published an article.COA of Formula: C9H11NO2 The title of the article was Total synthesis of acronycine and noracronycine: An aryne amination approach. And the article contained the following:

Acronycine and noracronycine are chromene-containing alkaloids with significant biol. activity. We have accomplished a concise total synthesis of acronycine and noracronycine. The key step, regioselective nucleophilic addition of anthranilate to chromene-type arynes under mild and transition-metal-free conditions was achieved. In addition, further modifications of nucleophilic addition products, such as hydrogenation, O-functionalization and palladium-catalyzed coupling reactions have also been developed, providing a concise procedure for these alkaloids and their derivatives The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).COA of Formula: C9H11NO2

The Article related to acronycine synthesis regioselective nucleophilic addition, noracronycine synthesis, Alkaloids: Alkaloids Containing One Nitrogen Atom In A Ring and other aspects.COA of Formula: C9H11NO2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Liao, Guochao; Zhou, Zhifang; Guo, Zhongwu published an article in 2015, the title of the article was Synthesis and immunological study of α-2,9-oligosialic acid conjugates as anti-group C meningitis vaccines.Safety of Bis(2,5-dioxopyrrolidin-1-yl) glutarate And the article contains the following content:

α-2,9-Di-, tri-, tetra-, and pentasialic acids were prepared and conjugated with a carrier protein. The resultant glycoconjugates elicited robust T cell-mediated immunity in mice. α-2,9-Trisialic acid was identified as a promising antigen for developing glycoconjugate vaccines against group C Neisseria meningitidis. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Safety of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

The Article related to synthesis immunol oligosialate conjugate neisseria antibacterial vaccine meningitis, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Safety of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On March 24, 2016, Cremonesi, Susanna; Luker, Tim; Semeraro, Teresa; Micheli, Fabrizio published a patent.Name: tert-Butyl 1-oxo-2,9-diazaspiro[5.5]undecane-9-carboxylate The title of the patent was Preparation of spirocyclic derivatives for the treatment and prevention of dopamine transporter-mediated diseases. And the patent contained the following:

The invention relates to preparation of spirocyclic derivs of formula I wherein R1, R2, R3, R4, R5, R6, R9, R10, Q, X, Y, Z, A, L, B, m, n and p are as defined in the disclosure, pharmaceutical compositions comprising such compounds; their use in therapy (for example in the treatment or prevention of a disease, disorder or condition ameliorated by inhibition of a dopamine transporter). The experimental process involved the reaction of tert-Butyl 1-oxo-2,9-diazaspiro[5.5]undecane-9-carboxylate(cas: 1198284-94-4).Name: tert-Butyl 1-oxo-2,9-diazaspiro[5.5]undecane-9-carboxylate

The Article related to spirocyclic derivative preparation dopamine transporter disease therapy prophylaxis, Heterocyclic Compounds (More Than One Hetero Atom): General and other aspects.Name: tert-Butyl 1-oxo-2,9-diazaspiro[5.5]undecane-9-carboxylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On February 26, 2020, Guo, Yinliang; Guo, Zhixian; Lu, Jia-Tian; Fang, Runting; Chen, Si-Cong; Luo, Tuoping published an article.Application In Synthesis of Methyl 2-cyclopentanonecarboxylate The title of the article was Total Synthesis of (-)-Batrachotoxinin A: A Local-Desymmetrization Approach. And the article contained the following:

An enantioselective total synthesis of (-)-batrachotoxinin A is accomplished based on a key photoredox coupling reaction and the subsequent local-desymmetrization operation (I + II → III → IV). After the expedient assembly of the highly oxidized steroid skeleton, a delicate sequence of redox manipulations was carried out to deliver a late-stage intermediate on gram scale-and ultimately (-)-batrachotoxinin A (V) in an efficient manner. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Application In Synthesis of Methyl 2-cyclopentanonecarboxylate

The Article related to batrachotoxinin a enantioselective total synthesis photoredox coupling desymmetrization, Alkaloids: Alkaloids Containing One Nitrogen Atom In A Ring and other aspects.Application In Synthesis of Methyl 2-cyclopentanonecarboxylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On June 15, 2016, Scott, Andrew E.; Christ, William J.; George, Alison J.; Stokes, Margaret G. M.; Lohman, Gregory J. S.; Guo, Yuhong; Jones, Matthew; Titball, Richard W.; Atkins, Timothy P.; Campbell, A. Stewart; Prior, Joann L. published an article.Safety of (Trimethoxymethyl)benzene The title of the article was Protection against Experimental Melioidosis with a Synthetic manno-Heptopyranose Hexasaccharide Glycoconjugate. And the article contained the following:

Melioidosis is an emerging infectious disease caused by Burkholderia pseudomallei and is associated with high morbidity and mortality rates in endemic areas. Antibiotic treatment is protracted and not always successful; even with appropriate therapy, up to 40% of individuals presenting with melioidosis in Thailand succumb to infection. In these circumstances, an effective vaccine has the potential to have a dramatic impact on both the scale and the severity of disease. Currently, no vaccines are licensed for human use. A leading vaccine candidate is the capsular polysaccharide consisting of a homopolymer of unbranched 1→3 linked 2-O-acetyl-6-deoxy-β-D-manno-heptopyranose. Here, we present the chem. synthesis of this challenging antigen using a novel modular disaccharide assembly approach. The resulting hexasaccharide was coupled to the nontoxic Hc domain of tetanus toxin as a carrier protein to promote recruitment of T-cell help and provide a scaffold for antigen display. Mice immunized with the glycoconjugate developed IgM and IgG responses capable of recognizing native capsule, and were protected against infection with over 120 × LD50 of B. pseudomallei strain K96243. This is the first report of the chem. synthesis of an immunol. relevant and protective hexasaccharide fragment of the capsular polysaccharide of B. pseudomallei and serves as the rational starting point for the development of an effective licensed vaccine for this emerging infectious disease. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Safety of (Trimethoxymethyl)benzene

The Article related to melioidosis vaccine synthetic burkholderia mannoheptopyranose hexasaccharide glycoconjugate, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Safety of (Trimethoxymethyl)benzene

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics