Month: December 2022

Amino, Yusuke published the artcileSynthesis and evaluation of L-cystathionine as a standard for amino acid analysis, Safety of (S)-tert-Butyl 2-((tert-butoxycarbonyl)amino)-4-iodobutanoate, the publication is Bioscience, Biotechnology, and Biochemistry (2017), 81(1), 95-101, database is CAplus and MEDLINE.

L-Cystathionine is a key nonprotein amino acid related to metabolic conditions. The quant. determination of L-cystathionine in physiol. fluids by amino acid anal. is important for clin. diagnosis; however, certified reference material for L-cystathionine with satisfactory purity, content, and quantity has been unavailable until recently. Consequently, a practical and simple method for the preparation of L-cystathionine was examined, which involves thioalkylation of N-tert-butoxycarbonyl-L-cysteine tert-Bu ester, derived from L-cystine, with (2S)-2-(tert-butoxycarbonyl)amino-4-iodobutanoic acid tert-Bu ester, derived from L-aspartic acid, to obtain L-cystathionine with protecting groups, followed by single-step deprotection under mild conditions. This method produces L-cystathionine in high purity (99.4%) and having sufficient percentage content according to amino acid anal., which could be used as a standard for the amino acid anal. of physiol. fluids.

Bioscience, Biotechnology, and Biochemistry published new progress about 161370-66-7. 161370-66-7 belongs to iodides-buliding-blocks, auxiliary class Chiral,Iodide,Amine,Aliphatic hydrocarbon chain,Ester,Amide, name is (S)-tert-Butyl 2-((tert-butoxycarbonyl)amino)-4-iodobutanoate, and the molecular formula is C13H24INO4, Safety of (S)-tert-Butyl 2-((tert-butoxycarbonyl)amino)-4-iodobutanoate.

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

Watanabe, Daisuke published the artcileSynthesis of desmosine-d₄: Improvement of isotopic purity by D-H exchange of amino groups, Computed Properties of 161370-66-7, the publication is Tetrahedron Letters (2017), 58(12), 1194-1197, database is CAplus.

Desmosine is a crosslinking pyridinium amino acid of elastin, which is a useful biomarker for the diagnosis of chronic obstructive pulmonary disease (COPD) by LC-MS/MS anal. We previously reported a synthesis of desmosine-d₄, which is useful as an internal standard for quant. LC-MS/MS anal. of desmosines, by deuterogenation of an alkyne group; however, the isotopic purity of the desmosine-d₄ was only ca. 50%. The present report describes a new synthesis of desmosine-d₄ that improves the isotopic purity to ca. 90% by exchanging the protons of the amino groups to deuterium using deuterogenation.

Tetrahedron Letters published new progress about 161370-66-7. 161370-66-7 belongs to iodides-buliding-blocks, auxiliary class Chiral,Iodide,Amine,Aliphatic hydrocarbon chain,Ester,Amide, name is (S)-tert-Butyl 2-((tert-butoxycarbonyl)amino)-4-iodobutanoate, and the molecular formula is C12H15BF2O2, Computed Properties of 161370-66-7.

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

Schaefer, Bernhard published the artcileDitopic Hexadentate Ligands with a Central Dihydrobenzo-diimidazole Unit Forming a [2×2] Zn₄ Grid Complex, Formula: C6H13I, the publication is European Journal of Organic Chemistry (2021), 2021(16), 2301-2310, database is CAplus.

A family of ditopic hexadentate ligands based on the parent compound 2,6-bis(6-(pyrazol-1-yl)pyridin-2-yl)-1,5-dihydrobenzo[1,2-d:4,5-d’]diimidazole (L) was developed and synthesized by using a straightforward condensation reaction, which forms the interlinking central benzo[1,2-d:4,5-d’]diimidazole bridge in the ligand backbone. The two secondary amine groups of the benzodiimidazole unit tautomerize and allow the formation of two tauto-conformers, which upon treatment with metal salts forms different isomeric coordination complexes. Here authors report six new derivatives (1–6) that can tautomerize (varying the pyrazolylpyridine part) and 14 derivatives (7–13) with different alkyl and benzyl substitution on secondary amino groups (of L) that prevent the tautomerization. This way, it is possible to study the properties of isomeric coordination complexes and their intrinsic cooperativity by the example of [2×2] grid complexes in the future. A [2×2] Zn₄ complex of the ligand L was synthesized and structurally characterized.

European Journal of Organic Chemistry published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Formula: C6H13I.

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

Povie, Guillaume published the artcileRadical chain repair: The hydroalkylation of polysubstituted unactivated alkenes, COA of Formula: C5H9IO2, the publication is Science Advances (2018), 4(7), eaat6031, database is CAplus and MEDLINE.

The concept of repair is widely used by nature to heal mols. such as proteins, lipids, sugars, and DNA that are damaged by hydrogen atom abstraction resulting from oxidative stress. We show that this strategy, rather undocumented in the field of synthetic organic chem., can be used in a radical chain reaction to enable notoriously intractable transformations. By overcoming the radical chain inhibitor properties of substituted alkenes, the radical-mediated hydroalkylation of mono-, di-, tri-, and even tetrasubstituted unactivated olefins could be performed under mild conditions. With a remarkable functional group tolerance, this reaction provides a general coupling method for the derivatization of olefin-containing natural products.

Science Advances published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, COA of Formula: C5H9IO2.

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

Huang, Qi published the artcileA Giese reaction for electron-rich alkenes, Recommanded Product: Ethyl 2-Iodopropionate, the publication is Chemical Science (2021), 12(6), 2225-2230, database is CAplus and MEDLINE.

A general method for the hydroalkylation of electron-rich terminal and non-terminal alkenes such as enol esters, alkenyl sulfides, enol ethers, silyl enol ethers, enamides and enecarbamates has been developed. The reactions are carried out at room temperature under air initiation in the presence of triethylborane acting as a chain transfer reagent and 4-tert-butylcatechol (TBC) as a source of hydrogen atom. The efficacy of the reaction is best explained by very favorable polar effects supporting the chain process and minimizing undesired polar reactions. The stereoselective hydroalkylation of chiral N-(alk-1-en-1-yl)oxazolidin-2-ones takes place with good to excellent diastereocontrol.

Chemical Science published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, Recommanded Product: Ethyl 2-Iodopropionate.

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

Zhang, Guobing published the artcileSmall molecules based on strongly electron-deficient aza-isatinylidene malononitrile for solution-processed n-type field-effect transistors, Recommanded Product: 1-Iodohexane, the publication is Synthetic Metals (2022), 117071, database is CAplus.

In this paper, three donor-acceptor (D/A) small mols. (M1, M2, and M3) based on aza-isatinylidene malononitrile (AIMN) and diketopyrrolopyrrole (DPP) containing different N-alkyl chains in AIMN unit were synthesized and characterized for application in solution-processable organic field-effect transistors (OFETs). The D/A small mols. with strongly electron-withdrawing AIMN and DPP units exhibited broad absorption spectra, low bandgaps, and deep LUMO energy levels (< – 4.0 eV). Consequently, OFET devices displayed unipolar electron transport characteristics with the highest electron mobilities of 0.26, 0.22, and 0.0079 cm2V-1s-1 for M1, M2, and M3, resp. The small mols. with linear side chains showed much higher field-effect performances than that of branched side chains- based small mol., due to the strong π-π stacking and appropriate morphol. This work indicated that the strongly electron-deficient AIMN should be a potential unit for constructing the n-type solution-processable small mol. semiconductors.

Synthetic Metals published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C9H7F3O3, Recommanded Product: 1-Iodohexane.

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

Sun, Mingxiang published the artcileSmall molecule semiconductors based on hemi-isoindigo and diketopyrrolopyrrole for solution-processed organic field-effect transistors, Product Details of C6H13I, the publication is Synthetic Metals (2021), 116833, database is CAplus.

Two small semiconductor mols. based on diketopyrrolopyrrole (DPP) and hemi-isoindigo units with and without fluorination were designed and synthesized for investigating the solution-processed organic field-effect transistors (OFETs). Bottom-gate/top-contact (BG/TC) OFETs were fabricated to explore carrier transport characteristics. The combination of d. functional theory (DFT) calculation, grazing incidence X-ray diffraction (GIXD), and at. force microscopy (AFM) allowed us to understand the relationship between structures and properties. The results revealed the small mol. with fluorination (DPP-T-FMI) exhibited better field-effect performance owing to the improved crystal packing and morphol. of thin-films.

Synthetic Metals published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H8O4, Product Details of C6H13I.

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

Zhang, Guangyu published the artcileDiverse and chemoselective sigmatropic shift rearrangements of multisubstituted N,O-diarylhydroxylamines, COA of Formula: C7H3IN2O2, the publication is Organic & Biomolecular Chemistry (2022), 20(27), 5470-5480, database is CAplus and MEDLINE.

Possible N/O[1,3] sigmatropic shift rearrangements of multisubstituted N,O-diarylhydroxylamines were investigated exptl. with rationally designed substrates, which were generally in situ prepared from suitable nitroaryl halides and N-arylhydroxylamines via aromatic nucleophilic substitution. The results indicate that both N- and O-(2,4,6-trimethylphenyl)hydroxylamines still favor the [3,3] sigmatropic shift followed by tautomerization rather than N[1,3] and O[1,3] sigmatropic shifts and the rearranged products of N-(2,4,6-trimethylphenyl)hydroxylamines further undergo an intramol. nucleophilic addition to afford dibenzo[b,d]furan-4a(9bH)-amine derivatives I [R = H, NO₂; EWG = NO₂, CN], while N-(4-mono- and 3,5-disubstituted phenyl)-O-(2,4,6-trinitrophenyl)hydroxylamines favorably first undergo the O[1,3] sigmatropic shift followed by tandem Smiles rearrangement and amide/ester exchange reactions, generating 2-arylaminoaryl benzoate derivatives N-Phenyl-O-(2,4,6-trinitrophenyl)hydroxylamines undergo tandem double O[1,3] sigmatropic shift rearrangement to produce formal O[1,5] shift products. However, O-(2,6-dinitrophenyl)-N-(4-substituted phenyl)hydroxylamines undergo tandem O[1,3] and double [3,3] sigmatropic shift rearrangements to give formal 3,5-shift products. The proposed mechanism was rationalized by d. functional theory (DFT) calculations The current investigation provided not only a comprehensive understanding of the chemoselective sigmatropic shift rearrangements of N,O-diarylhydroxylamines, but also some novel synthetic strategies for dibenzo[b,d]furanamines, diarylamines, diaryl ethers, 2′-amino-[1,1′-biphenyl]-2(1H)-one, and 2′-amino-[1,1′-biaryl]-4-ol derivatives

Organic & Biomolecular Chemistry published new progress about 101420-79-5. 101420-79-5 belongs to iodides-buliding-blocks, auxiliary class Nitrile,Nitro Compound,Iodide,Benzene,Benzene Compounds, name is 4-Iodo-3-nitrobenzonitrile, and the molecular formula is C10H10O2, COA of Formula: C7H3IN2O2.

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