Tag: M.W=700-800

Rothlingshofer, Manuel published the artcileNucleic Acid-Templated Energy Transfer Leading to a Photorelease Reaction and its Application to a System Displaying a Nonlinear Response, Safety of 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, the publication is Journal of the American Chemical Society (2011), 133(45), 18110-18113, database is CAplus and MEDLINE.

The photocleavage of a nitrobenzyl-type linker (NPPOC) at 405 nm wavelength was enabled by nucleic acid-templated energy transfer from a sensitizer (thioxanthenone) to the linker. This strategy was used to release profluorescent rhodamine, which facilitated monitoring of the reaction via fluorescence measurement in a nonoverlapping window with the sensitizer/photocleavage reaction. The rate acceleration of the templated reaction was greater than 20-fold over the background reaction. The templated reaction was used in conjunction with strand displacement to design four-component systems that responded to an analyte (DNA). Programming a specific hierarchical relationship among the four components enabled the design of a system that responded first pos. and then neg. to increasing levels of an analyte.

Journal of the American Chemical Society published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Safety of 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Huang, Kuo-Ting published the artcileCombinatorial Self-Assembly of Glycan Fragments into Microarrays, Recommanded Product: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, the publication is ChemBioChem (2011), 12(1), 56-60, database is CAplus and MEDLINE.

We have demonstrated that complex glycan arrays can be accessed through the combinatorial self assembly of PNA-encoded carbohydrate fragments. Although the use of DNA microarrays to sort carbohydrate-DNA conjugates had previously been reported, previous efforts were restricted to monosaccharides and did not explore a broad range of glycan structures, nor their combinatorial assembly. The cooperativity of the fragments in their interaction with carbohydrate-binding proteins was demonstrated with two different lectins. The binding profile showed the strongest interaction for discrete combinations of two fragments. Importantly, the PNA-tagged glycans can be readily prepared from native oligosaccharides obtained from natural or com. sources by conversion of the anomeric position into a thiol on a mg scale by a two- to three-step process. The simplicity of the protocols described should make glycan arrays more broadly accessible. Immobilization of glycans by hybridization offers a reliable approach by which to obtain a homogeneous distribution of ligands within a microarray spot and allows the use of microarrays with higher d. than accessible by contact printing, which is currently the standard practice. Last but not least, combinatorial self assembly of fragments on DNA microarrays should be broadly applicable beyond the glycan fragments described here.

ChemBioChem published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Recommanded Product: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Xavier, Catarina published the artcileSynthesis, characterization, and evaluation of a novel ^99mTc(CO)₃ pyrazolyl conjugate of a peptide nucleic acid sequence, Quality Control of 186046-83-3, the publication is JBIC, Journal of Biological Inorganic Chemistry (2008), 13(8), 1335-1344, database is CAplus and MEDLINE.

The 16-mer peptide nucleic acid sequence H-A GAT CAT GCC CGG CAT-Lys-NH₂ (1), which is complementary to the translation start region of the N-myc oncogene mRNA, was synthesized and conjugated to a pyrazolyl diamine bifunctional chelator (pz). The novel conjugate pz-A GAT CAT GCC CGG CAT-Lys-NH₂ (2) was labeled with technetium tricarbonyl, yielding quant. the complex fac-[^99mTc(CO)₃(κ³-pz-A GAT CAT GCC CGG CAT-Lys-NH₂)]²⁺ (4). Complex 4 was obtained with high radiochem. purity and high specific activity, revealing high stability in human serum and in cell culture medium. The identity of 4 was confirmed by comparing its reversed-phase high performance liquid chromatog. profile with that of the rhenium analog fac-[Re(CO)₃(κ³-pz-A GAT CAT GCC CGG CAT-Lys-NH₂)]²⁺ (3), prepared by conjugation of fac-[Re(CO)₃(3,5-Me₂pz(CH₂)₂N((CH₂)₃COOH)(CH₂)₂NH₂)]⁺ to 1, using solid-phase techniques. UV melting experiments of 1 and 3 with the complementary DNA sequence led to the formation of stable duplexes, indicating that the conjugation of 1 to the pyrazolyl chelator and to the metal fragment fac-[M(CO)₃]⁺ did not affect the recognition of the complementary sequence as well as the duplex stability. For a first screening, SH-SY5Y human neuroblastoma cells, which express N-myc, were treated with 4. The results show that 4 internalizes (7% of the activity goes into the cells, after 4 h at 37°), presenting also a relatively high cellular retention (only 40% of internalized activity is released from the cells after 5 h).

JBIC, Journal of Biological Inorganic Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C2H3N3, Quality Control of 186046-83-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Husken, Nina published the artcile“Four-Potential” Ferrocene Labeling of PNA Oligomers via Click Chemistry, Category: amides-buliding-blocks, the publication is Bioconjugate Chemistry (2009), 20(8), 1578-1586, database is CAplus and MEDLINE.

The scope of the Cu(I)-catalyzed [2 + 3] azide/alkyne cycloaddition (CuAAC, click chem.) as a key reaction for the conjugation of ferrocene derivatives to N-terminal functionalized PNA oligomers is explored herein (PNA: peptide nucleic acid). The facile solid-phase synthesis of N-terminal azide or alkyne-functionalized PNA oligomer precursors and their cycloaddition with azidoferrocene, ethynylferrocene, and N-(3-ethylpent-1-yn-3-yl)ferrocene-carboxamide (DEPA-ferrocene) on the solid phase are presented. While the click reaction with azidomethylferrocene worked equally well, the ferrocenylmethyl group is lost from the conjugate upon acid cleavage. However, the desired product was obtained via a post-SPPS conversion of the alkyne-PNA oligomer with azidomethylferrocene in solution The synthesis of all ferrocene-PNA conjugates (trimer t₃-PNA, 3, 4, 5, 6; 12mer PNA, 10 – t c t a c a a g a c t c, 11 – t c t a c c g t a c t c) succeeded with excellent yields and purities, as determined by mass spectrometry and HPLC. Electrochem. studies of the trimer Fc-PNA conjugates 3, 4, 5, and 6 with four different ferrocene moieties revealed quasi-reversible redox processes of the ferrocenyl redox couple Fc^0/+ and electrochem. half-wave potentials in a range of E_1/2 = -20 mV to +270 mV vs FcH^0/+ (Fc: ferrocenyl, C₁₀H₉Fe). The observed potential differences ΔE_1/2^min are always greater than 60 mV for any given pair of Fc-PNA conjugates, thus allowing a reliable differentiation with sensitive electrochem. methods like e.g. square wave voltammetry (SWV). This is the electrochem. equivalent of “four-color” detection and is hence denoted “four-potential” labeling. Preparation and electrochem. investigation of the set of four structurally different and electrochem. distinguishable ferrocenyl groups conjugated to PNA oligomers, as exemplified by the conjugates 3, 4, 5, and 6, demonstrates the scope of the azide/alkyne cycloaddition for the labeling of PNA with electrochem. active ferrocenyl groups. Furthermore, it provides a PNA-based system for the electrochem. detection of single-nucleotide polymorphism (SNP) in DNA/RNA.

Bioconjugate Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Category: amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Sosniak, Anna M. published the artcileThermal melting studies of alkyne- and ferrocene-containing PNA bioconjugates, Related Products of amides-buliding-blocks, the publication is Organic & Biomolecular Chemistry (2009), 7(23), 4992-5000, database is CAplus and MEDLINE.

The preparation of new metal-containing peptide nucleic acids (PNAs) is currently a field of research intensively studied for various purposes, such as DNA biosensors. The role played by the metal center, notably on the stability of the PNA·DNA hybrid, is obviously crucial, but has not yet been fully investigated. In this work, UV-Vis spectroscopic measurements of solutions of DNA·PNA hybrids, whose 11/12-mer PNA oligomers contained either alkynyl PNA monomer I or ferrocene-containing PNA monomer II, were carried out to determine the effect of these monomers on the thermal stability of the hybrids (PNA = H-Gly-X-gggtc-Y-agctt-X-Lys-NH₂; X, Y = I, II, blank position). Supplementary CD spectroscopic measurements were performed to gain insight into the structures of the PNA·DNA duplexes formed. The effect of both modified monomers was found to depend on their actual positions within the PNA sequences. Insertions at the N- or C-termini of a PNA oligomer did not change the melting temperatures (T_m values of about 72°) of the DNA·PNA hybrids significantly. Insertion of monomers I or II in the middle of a PNA sequence induced a substantial decrease in the T_m of the hybrids (by about 23°) when bound to the same DNA oligomer. Interestingly, it was found that the type of modification, namely alkyne or ferrocene, did not significantly influence the T_m values in these cases. However, the thermal stability of hybrids with the DNA oligomers containing one to four addnl. thymines and the PNA oligomers containing the ferrocene moiety in its middle, varied significantly with the number of thymines added compared to its alkyne analogs (ΔT_m up to -13°). The presence of the ferrocene moiety induced a significant decrease in thermal stability of the hybrids, probably due to its bulkiness. In order to assess the effect of PNA backbone rigidity on the stability of DNA·PNA hybrids, PNA oligomers with an internal amino acid, propargylglycine (Pgl) or the dipeptide glycine-propargylglycine (Gly-Pgl), were synthesized. It was assumed that the orientation of the alkyne moiety in the Pgl-containing PNA sequence is not identical to an alkyne-containing PNA sequence, as a significantly higher T_m value (ΔT_m = +10°) was measured. It is anticipated that the alkyne moiety in Pgl is not facing the DNA base and therefore does not disturb as much the neighboring nucleobases and base-stacking of the complementary DNA, in contrast to the alkyne moiety of I. Interestingly, no significant differences in the thermal stability of the hybrids was observed between Pgl-containing and dipeptide-containing PNA oligomers, although the former contracts the PNA backbone by three atoms.

Organic & Biomolecular Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C6H16OSi, Related Products of amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Chantell, Christina A. published the artcileLow-cost, automated synthesis of a PNA-peptide conjugate on a peptide synthesizer, Product Details of C40H35N7O8, the publication is American Biotechnology Laboratory (2009), 27(8), 8-10, database is CAplus.

Two peptide nucleic acid (PNA) sequences, one containing a lysine residue at the C-terminus and the other containing a peptide analog of LH-releasing hormone, were synthesized in an automated peptide synthesizer. The PNA sequence was constructed from protected monomers, Fmoc-A(Bhoc)aeg-OH, Fmoc-C(Bhoc)aeg-OH, Fmoc-G(Bhoc)aeg-OH and Fmoc-T-aeg-OH, which were coupled to Fmoc-Lys(Boc)-Wang resin using HATU as a coupling reagent. This work demonstrated the successful automated synthesis of a PNA sequence and a PNA-peptide conjugate on “Prelude” automated peptide synthesizer which enabled minimizing overall consumption and costs.

American Biotechnology Laboratory published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Product Details of C40H35N7O8.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Chu, Te-Wei published the artcileHybrid polymeric hydrogels via peptide nucleic acid (PNA)/DNA complexation, Synthetic Route of 186046-83-3, the publication is Journal of Controlled Release (2015), 220(Part_B), 608-616, database is CAplus and MEDLINE.

This work presents a new concept in hybrid hydrogel design. Synthetic water-soluble N-(2-hydroxypropyl)methacrylamide (HPMA) polymers grafted with multiple peptide nucleic acids (PNAs) are crosslinked upon addition of the linker DNA. The self-assembly is mediated by the PNA-DNA complexation, which results in the formation of hydrophilic polymer networks. We show that the hydrogels can be produced through two different types of complexations. Type I hydrogel is formed via the PNA/DNA double-helix hybridization. Type II hydrogel utilizes a unique “P-form” oligonucleotide triple-helix that comprises two PNA sequences and one DNA. Microrheol. studies confirm the resp. gelation processes and disclose a higher critical gelation concentration for the type I gel when compared to the type II design. SEM reveals the interconnected microporous structure of both types of hydrogels. Type I double-helix hydrogel exhibits larger pore sizes than type II triple-helix gel. The latter apparently contains denser structure and displays greater elasticity as well. The designed hybrid hydrogels have potential as novel biomaterials for pharmaceutical and biomedical applications.

Journal of Controlled Release published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Synthetic Route of 186046-83-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Shen, Gang published the artcilePhospholipid Conjugate for Intracellular Delivery of Peptide Nucleic Acids, HPLC of Formula: 186046-83-3, the publication is Bioconjugate Chemistry (2009), 20(9), 1729-1736, database is CAplus and MEDLINE.

Peptide nucleic acids (PNAs) have a number of attractive features that have made them an ideal choice for antisense and antigene-based tools, probes, and drugs, but their poor membrane permeability has limited their application as therapeutic or diagnostic agents. Herein, we report a general method for the synthesis of phospholipid-PNAs (LP-PNAs) and compare the effect of noncleavable lipids and bioreductively cleavable lipids (L and LSS) and phospholipid (LP) on the splice-correcting bioactivity of a PNA bearing the cell penetrating Arg9 group (PNA-R9). While the three constructs show similar and increasing bioactivity at 1-3 μM, the activity of LP-PNA-R9 continues to increase from 4-6 μM, while the activity of L-PNA-R9 remains constant and that of LSS-PNA-R9 decreases rapidly in parallel with their relative cytotoxicity. The activity of both LP-PNA-R9 and L-PNA-R9 dramatically increased in the presence of chloroquine, as expected for an endocytic entry mechanism. The constructs were also found to have CMC values of 1.0 and 4.5 μM, resp., in 150 mM NaCl, pH 7 water, suggesting that micelle formation may play a hitherto unrecognized role in modulating toxicity and/or facilitating endocytosis.

Bioconjugate Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C19H14N2, HPLC of Formula: 186046-83-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Brun, Omar published the artcileOn-Resin Conjugation of Diene-Polyamides and Maleimides via Diels-Alder Cycloaddition, Product Details of C40H35N7O8, the publication is Journal of Organic Chemistry (2015), 80(12), 6093-6101, database is CAplus and MEDLINE.

The reaction between maleimides and resin-bound diene-polyamides (polyamides are represented by peptides and peptide nucleic acids or PNAs) allows the latter to be used in the preparation of conjugates. Conjugation takes place by reacting the insoluble, hydrophobic diene component either with water-soluble dienophiles or with dienophiles requiring mixtures of water and organic solvents. Exptl. conditions can be adjusted to furnish the target conjugate in good yield with no need of adding large excesses of soluble reagent. In case protected maleimides are used, maleimide deprotection and Diels-Alder cycloaddition can be simultaneously carried out to render conjugates with different linking positions. On-resin conjugation is followed by an acidic treatment that removes the polyamide protecting groups with no harm to the cycloadduct, in contrast with the unreacted diene that is indeed degraded under these conditions. Cycloadducts incorporating suitable functional groups can undergo subsequent addnl. conjugation reactions in solution to furnish double conjugates.

Journal of Organic Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Product Details of C40H35N7O8.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Bowler, Frank R. published the artcileDNA Analysis by Dynamic Chemistry, HPLC of Formula: 186046-83-3, the publication is Angewandte Chemie, International Edition (2010), 49(10), 1809-1812, S1809/1-S1809/29, database is CAplus and MEDLINE.

Herein we report the application of dynamic chem. to DNA anal., offering the prospect of nonenzymic genotyping of genomic DNA amplified by polymerase chain reaction (PCR). This was achieved by the synthesis of a PNA strand that contained a blank position opposite the nucleobase under anal. in a complementary DNA template. A reversible reaction, between this PNA/DNA duplex (specifically the secondary amine of the “PNA blank”) and four aldehyde-modified nucleobases, means that the templating power of Watson-Crick base pairing and base stacking would be expected to drive the selection of the fully complementary iminium nucleobase. Subsequent reduction and MALDI-TOF mass spectrometry would allow rapid determination of base incorporation.

Angewandte Chemie, International Edition published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, HPLC of Formula: 186046-83-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics