1021-91-6Relevant articles and documents
Novel dibenzosuberene substituted aroyl selenoureas: Synthesis, crystal structure, DFT, molecular docking and biological studies
Musthafa, Moideen,Konakanchi, Ramaiah,Ganguly, Rakesh,Sreekanth, Anandaram
, p. 331 - 338 (2020)
A series of aroyl selenourea dibenzosuberene (1–3) derivatives were synthesized and characterized by different analytical methods and single crystal X-ray crystallography. Quantum chemical computations were made using DFT to determine the structural and molecular properties of the compounds. The in?vitro antibacterial action of the compounds was evaluated against chosen gram-negative (Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli), and gram-positive (Bacillus subtilis, Staphylococcus aureus, and Staphylococcus epidermidis) bacteria for their antifungal activity against Curvularia lunata, Penicillium notatum, and Aspergillus niger. Using molecular docking studies, the binding modes were understood along with the mechanism in opposing the target protein MurB.
A Compact and Synthetically Accessible Fluorine-18 Labelled Cyclooctyne Prosthetic Group for Labelling of Biomolecules by Copper-Free Click Chemistry
Murrell, Emily,Kovacs, Michael S.,Luyt, Leonard G.
, p. 1625 - 1628 (2018)
A new fluorine-containing azadibenzocyclooctyne (ADIBO-F) was designed using a synthetically accessible pathway. The fluorine-18 prosthetic group was prepared from its toluenesulfonate precursor and isolated in 21–35 % radiochemical yield in 30 minutes of synthetic time. ADIBO-F has been incorporated into azide-functionalized, cancer-targeting peptides through a strain-promoted alkyne–azide cycloaddition with high radiochemical yields and purities. The final products are novel peptide-based positron emission tomography (PET) imaging agents that possess high affinities for their targets, growth hormone secretagogue receptor 1a (GHSR-1a) and gastrin-releasing peptide receptor (GRPR), with IC50 values of 9.7 and 0.50 nm, respectively. This is a new and rapid labelling option for the incorporation of fluorine-18 into biomolecules for PET imaging.
Highly Efficient Multigram Synthesis of Dibenzoazacyclooctyne (DBCO) without Chromatography
McNelles, Stuart A.,Pantaleo, Julia L.,Adronov, Alex
, p. 2740 - 2745 (2019)
The synthesis of 4-[11,12-didehydrodibenzo[b,f]azocin-5(6H)-yl]-4-oxobutanoic acid, also known as dibenzoazacyclooctyne (DBCO) or aza-dibenzocyclooctyne (ADIBO), was optimized for large-scale preparations of at least 10 g with an overall yield of 42%.
A novel metal-free synthesis of 6H-isoindolo[2,1-α]indol-6-one
Dai, Chaofeng,Draganov, Alexander B.,Wang, Binghe
, p. 245 - 247 (2010)
6 H -Isoindolo[2,1- α]indol-6-one, a core structure for a number of biologically active compounds, was synthesized in four steps. The approach is metal-free and uses a Beckmann rearrangement followed by an intramolecular cyclization.
A two-step strategy to radiolabel choline phospholipids with99mTc in S180 cell membranes via strain-promoted cyclooctyne–azide cycloaddition reaction
Chen, Qingxin,Chu, Taiwei
, p. 5472 - 5475 (2016)
As tumor markers, the radiolabeling of choline (Cho)-containing phospholipids in cellular membranes with99mTc is a challenge. The conventional strategy to combine the metallic radionuclide with Cho by large ligand damages the bioactivity of Cho, resulting in low tumor-to-nontumor ratios. Pretargeting strategy based on strain-promoted cyclooctyne–azide cycloaddition (SPAAC) reaction was applied to solve this general problem. Functional click synthons were synthesized as pretargeting components: azidoethyl-choline (AECho) serves as tumor marker and azadibenzocyclooctyne (ADIBO) conjugated to bis(2-pieolyl) amine (BPA) ligand (ADIBO-BPA) as99mTc(CO)3-labeling and azido-binding group. Both in vitro cell experiment and in vivo biodistribution experiment indicate that it is versatile to radiolabel Cho in cellular membranes via this two-step pretargeting strategy. We believe that this pretargeting strategy can indeed enhance the target-specificity and also reduce background signals to optimize imaging quality.
Access to Cyanoimines Enabled by Dual Photoredox/Copper-Catalyzed Cyanation of O-Acyl Oximes
Wei, Ziyan,Yu, Shouyun,Zhang, Ai Hua,Zhang, Hao
supporting information, p. 7315 - 7320 (2020/10/02)
An efficient strategy for the synthesis of pharmaceutically important and synthetically useful cyanoimines, as well as cyanamides, has been described. This strategy is enabled by dual photoredox/copper-catalyzed cyanation of O-acyl oximes or O-acyl hydroxamides. This state of the art protocol for cyanoimines and cyanamides features readily available starting materials, mild reaction conditions, good functional group tolerance, and operational simplicity. The resultant cyanoimines can be transformed into structurally diverse and functionally important N-containing heterocycles.
Manipulating the Click Reactivity of Dibenzoazacyclooctynes: From Azide Click Component to Caged Acylation Reagent by Silver Catalysis
Ao, Jiwei,Huang, He,Huang, Wei,Jiang, Bofeng,Liu, Junjie,Ren, Xuelian,Shi, Wei,Tang, Feng,Tang, Yubo,Yang, Weibo,Yu, Qun
supporting information, p. 19940 - 19944 (2020/09/02)
Strain-promoted azide–alkyne cycloaddition using dibenzoazacyclooctyne (DBCO) is widely applied in copper-free bioorthogonal reactions. Reported here is the efficient acid-promoted rearrangement and silver-catalyzed amidation of DBCO, which alters its click reactivity robustly. In the switched click reaction, DBCO, as a caged acylation reagent, enables rapid peptide/protein modification after decaging facilitated by silver catalysts, rendering site-specific conjugation of an IgG antibody by a Fc-targeting peptide.
STEROIDS AND PROTEIN-CONJUGATES THEREOF
-
Paragraph 0630; 0632, (2018/05/27)
Described herein protein steroid conjugates that are useful, for example, for the target-specific delivery of glucocorticoids (GCs) to cells.
BIOMOLECULE CONJUGATES
-
Page/Page column 86, (2016/06/28)
The present invention relates to biomolecule conjugates which comprise a biomolecule wherein at least one non-natural amino acid (NNAA) is integral to the structure of the biomolecule and wherein the NNAA is a point of attachment of a linker to which a payload, particularly a cytotoxic agent, is attached. More specifically, this invention relates to conjugates of cell-binding agents and active release products comprising cytotoxic agents wherein the conjugates are produced by means of a cycloaddition reaction. Methods of production, pharmaceutical compositions and methods of use are provided.
Aza dibenzo link octyne compound and method for preparing the same
-
Paragraph 0057; 0058; 0059; 0060, (2017/02/02)
The invention discloses a heterocyclic nitrogen-dibenz-cyclooctyne class compound and a preparation method of the heterocyclic nitrogen-dibenz-cyclooctyne class compound, and belongs to the field of organic chemical synthesis. The structural general formula of the compound is shown in the formula I. 5-dibenz cycloheptene ketene serves as a starting material, final end product heterocyclic nitrogen-dibenz-cyclooctyne hydrochloride is obtained through the reactions of oximation, Beckmann rearrangement, amid reduction, protection, addition, debromination, deprotection and the like, and the total yield is higher than 73.6%. The raw material is easy to obtain, after-treatment is convenient and easy to operate, and the total yield is high. The heterocyclic nitrogen-dibenz-cyclooctyne class compound without a substituent on nitrogen atoms is synthezied for the first time, a novel method can be provided for synthesizing a heterocyclic nitrogen-dibenz-cyclooctyne class compound with different substituents on the nitrogen atoms, especially for synthesizing multiple heterocyclic nitrogen-dibenz-cyclooctyne class compounds with the different substituents on the nitrogen atoms, wherein the heterocyclic nitrogen-dibenz-cyclooctyne class compounds are not easy to prepare through other methods, a product of the heterocyclic nitrogen-dibenz-cyclooctyne class compound can serve as the raw material, and H on nitrogen is replaced by the needed R base.